PSH Quizziz Study Guide Midterm

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15.6 L = ___________ mL

15,600

How many valence electrons does an alkaline earth metal have?

2

If this equation is balanced, what number would go before OF? ___ F2 + ___ O2 --> ___ OF

2

Write 7.8 x 10 3 in standard form.

7,800

What is this number in scientific notation? 7,100, 000, 000

7.1 x 10 9

Convert this number to standard notation: 7.1 x 104

71,000

How many kilograms of calcium are there in 173 pounds of calcium? (1 pound = 454 grams; 1 kg = 1000 g)

78.5 kg

How many spaces and which way would you move the decimal to convert this number to scientific notation? 0.000000034

8 to the right, because there must be one number to the left of the decimal point that is more than 0 but less than 10

Gas costs $3.05 a gallon, and your car travels at 27 miles for each gallon of gas. How far can you travel in your car with $95 in your pocket?

840 miles

Convert this number into scientific notation: 950,000

9.5 x 10 5

At which point is the substance a solid?

A

What is an ion?

A charged atom

What type of reaction is NaCl + Fe(SO4) --> Na2(SO4) + FeCl2?

Double replacement

Which happens last?

Draw conclusions

Which Bohr model represents sodium?

Na

Which of the following is an example of an IONIC COMPOUND?

NaCl

What is an dependent variable?

What scientist measure to see if it responded to a change

What is a control?

What you keep the same throughout all experimental groups

2 or more different elements that are bonded together is called...

compound

Carbon Dioxide (CO2)

compound

Water (H2O)

compound

What you learned from the experiment is the ___.

conclusion

The reverse of vaporization is

condensation

Something that you keep the same in an experiment is called a(n)

control

What type of bond forms when 2 or more electrons are SHARED?

covalent bond

What subatomic particle(s) would be found orbiting the nucleus?

electrons only

Ca (calcium)

element

One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?

evaporation; physical change

Matter with no definite volume and no definite shape is a ____.

gas

The vertical (up and down) columns in the Periodic Table are called

groups

What type of matter is air?

homogeneous mixture

A testable explanation to a problem that has not yet been tested.

hypothesis

As per Charles' Law if temperature of any gas is increased its volume will -

increase

The _____ _______ is the factor that you purposely change or control in order to see what effect it has.?

independent variable

What type of bond is this? Lithium with Fluorine?

ionic

What type of bond forms between two or more atoms that are charged (+/-)?

ionic bond

Which of the following is a transition metal?

iron

Which SI unit is used to measure mass?

kg

If you conduct an experiment where you place 5 of the same red candies in different types of soda, all in the same amount of liquid and same type cups the indipendent variable is what?

kind of soda

Matter that has a definite volume but no definite shape is a ______.

liquid

Which SI unit is used to measure length?

m (meter)

Anything that has mass and takes up space is called

matter

Classify the following: Mystery Substance X is an electrical semiconductor, somewhat dull and brittle, a solid at room temperature and it conducts heat at times.

metalloid

Elements that lie along the stair-step line of the periodic table are ______.

metalloids

H2 is an example of a(n)...

molecule

Chemical symbol represents the _________ of an element.

name

An atom becomes _________ when it gains electrons.

negative

Anions are ______.

negative

An atoms overall charge is

neutral

Particles in an atom that are neutral and have no charge are

neutrons

The central region of an atom where its neutrons and protons are is its

nucleus

How many independent variables should you have in an experiment?

one

At higher temperatures

particles in an object move faster

Horizontal rows of the periodic table are called _________.

periods

Physical or Chemical Change? Making a paper airplane.

physical change

Water freezing into ice is an example of a...

physical change

Blue Color: Chemical or Physical Property

physical property

Solubility (dissolves): Chemical or Physical Property

physical property

An atom becomes _______ when it loses electrons.

positive

Cations are _______.

positive

Which subatomic particle is responsible for element identification?

proton

The positive particles of an atom are

protons

In which state of matter are the forces of attraction among the particles is so that they can only vibrate?

solid

Matter that has a definite volume and a definite shape is a ____.

solid

What TWO things make a solution? Select BOTH that apply on test

solute solvent

You have been injured in the laboratory (cut, burn, etc.). First you should

tell the science instructor at once

Which of the following indicates a chemical change?

temperature change

To put out a fire on a person's hair or clothes, use:

the fire blanket

You are heating a piece of glass and now want to pick it up. You should

use tongs

All factors that can change in an experiment.

variables

Sodium (Na) is found in group

1

What charge do you use for a proton?

+

What charge do you use for a electron?

-

Express the following in standard notation: 8.025 x 10-8

.00000008025

Name the compound: NaCl

sodium chloride

Which conversion fraction would be needed from this starting amount? 528 ft. Convert to miles

1 mile ————- 5280 ft.

A child weighs 40.0 lb and is to receive 0.10 mg of an antibiotic for each kg of body weight. How many milligrams of the antibiotic shall the child receive? 1 kg = 2.2 lbs

1.81 mg

At what temperature did bread mold the fastest?

100

Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?

2 g/cm3

What two types of atoms make a covalent bond?

2 nonmetals

240 cm = ___________ m

2.4

At what temperature did bread mold the slowest?

20

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

20

You know 1000 mg = 1 g. Convert 2.5 grams into milligrams.

2500 mg

Sodium (Na) is found in period

3

What is the atomic number for an element with 3 protons?

3

Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?

3 g/cm3

3 km = ___________ mm

3,000,000

How many neutrons does the isotope of lithium have?

5

55 mm = ___________ cm

5.5 cm

56 L = ___________ mL

56,000

An atom with atomic number 6 would have how many protons

6

Write 6,700 in scientific notation.

6.7 x 10^3

Convert this number into scientific notation: 0.068

6.8 x 10^-2 6.8 x 10 -2

Which of the following is an example of a heterogenous mixture?

A salad with lettuce, olives, and tomatoes

An Arsenic atom wants to form...

An anion

Which of these contains steps in the right order?

Ask a question, research, state your hypothesis, experiment, analyze, draw a conclusion

What is the first step in the scientific method?

Ask a question/make an observation

At what point(s) is a phase change occuring?

B and D

Point "B" is known as the:

Both freezing and melting point

Which of the following is a Halogen?

Bromine

At which point is this substance a liquid?

C

The chemical formula of carbon tetrachloride is

CCl4

carbon monoxide

CO

Which of the following is an Alkaline Earth Metal?

Calcium

A change in matter that forms one or more new substances with new chemical properties is a/an...

Chemical change

Which of the following is not a compound?

Cl

Ammonia (NH3)

Compound

A student can pick up any broken glass as long as they throw it in the trash.

False

The burning of wood is a physical change

False

True or False: Neutrons have a negative charge

False

Why are goggles an important part of lab safety equipment?

Goggles protect our eyes from chemicals and foreign objects.

The noble gases are in ______.

Group 18

Which of the following is an example of a COVALENT COMPOUND?

H2S

Sweet Tea, everything is mixed evenly and looks the same.

Homogeneous mixture

Your sister made you a glass of Kool-Aid, which was awfully nice, but it taste very weak.

Homogeneous mixture

Which of the following lists only elements?

K, Cl, N

Which of the following is a Noble Gas?

Krypton

Which is the third step?

Make a hypothesis

In a laboratory, the following should NOT be worn

Open toed shoes

The trees outside of the school have large, green leaves growing on them. Is this a Qualitative Observation, Quantitative Observation, or an Inference

Qualitative Observation

7.82 x 10-6 is an example of scientific notation. The exponent of -6 tells you your number will be very ________.

Small

Which of the following is an Alkali Metal?

Sodium

The following is NOT a step in the scientific method.

State a theiryy

I want to know if low strength bleach, medium strength bleach, or maximum strength bleach will get Heinz ketchup stains out of white T-shirts the best. What is the variable in this experiment?

The strength of the bleach

What is the correct name for C3H6?

Tricarbon hexahydride

True or False: Never remove chemicals, specimens, or other equipment from the laboratory

True

What is an independent variable?

What a scientist changes in an experiment to test their hypothesis

Which of the following is the most reactive group of metals?

alkali

If you are testing the buoyancy (galleggiabilità) of a cotton ball and you leave one plain, cover one half in oil, and cover the third in oil completely then place each in water, what is the independent variable?

amount of oil

If you do not understand a direction or part of a lab procedure, you should

ask the teacher

What does 12.011 represent?

atomic mass

What does the 1.00794 stand for?

atomic mass

In the modern periodic table, elements are arranged by:

atomic number

What does the 6 represent? Carbon 6 C 12.011

atomic number

What do these isotopes of carbon all have in common?

atomic number and electrons

All matter is made of what

atoms

Ions are formed when...

atoms lose or gain electrons

You are heating a substance in a test tube. Always point the open end of the tube

away from all people

Flammability (burns): Chemical or Physical Property

chemical property

UNDERSTANDING: The first number in scientific notation must not be...

between and including 1 and 9.9999

Which of the following is not a chemical property?

boiling

A change that alters the physical properties of a substance without changing its composition.

chemical change

Physical or Chemical Change? Baking a cake.

chemical change

Physical or Chemical Change? Iron rusts

chemical change

Horseplay or practical jokes in the laboratory are

dangerous and could cause harm and invalidate the experiment

The information you collect while doing your experiment is called

data

What type of reaction is represented?

decomposition

According to Boyle's law, at constant temperature, as the pressure of a given sample of gas is increased, the volume will -

decrease

As temperature increases, the time for the bread to mold

decreases

Name the compound: H2O

dihydrogen monoxide

Name the compound: P2F5

diphosphorus pentafluoride

During a phase change, the temperature...

doesn't change

Metals can be used as wire because they are _______.

ductile

A particle that moves around the nucleus is a(n)...

electron

A(n) ___________________________ is what you can learn about an object by using your 5 senses.

qualitative observation

A series of steps used by scientists to solve a problem or answer a question.

scientific method

To make observations you use your _______.

senses

When using scientific notation, a positive exponent means ...

the standard number is greater than one

A mixture ---

• has 2 or more ingredients • maintains their physical properties • easy to separate D. all of the above

What three factors increase the rate of solubility?

• small particle size • increase of temperature • stirring

What charge do you use for a neutron?


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