chemistry

1 meter

100 cm = what in meters

1 liter

1000 ml = what in liters

decreases

Going from left to right across Period 4, the atomic size _______

increases

Going from left to right across Period 4, the ionization energy ____

physical

Liquid water changing to ice is an example of a ________ change.

(Ar) Argon is are unreactive and are rarely found in combination with other elements

The Group 8A (18) elements ________.

1 milligram

0.001 g =

1 decigram

0.1 g = decigram

1000 joules

1 Kj = how many joules

1 ml

1 cm^3 =

1 liter

1 dm^3 =

3.78 liters

1 gallon = how many liters

2.54 cm

1 inch = how many cm

0.001 kj

1 joule = how many kj

1000 calories

1 kcal = how many cal

1000 grams

1 kilogram = what in gram

454 grams

1 pound = how many grams

0.946 liters

1 quart = how many liters

0.914 meters

1 yard = how many meters

1 liter

10^3 ml =

1 microgram

1×10^-6g =

1 gigagram

1×10^9g =

1 kg

2.2 lbs = how many kg

chemical change

A change in matter into a new kind or kinds of matter, ex. baking soda and vinegar

11.3 g/ml

A perfect cube of a substance, suspected to be lead, is measured to be 1.2 cm in length on each side and has a mass of 19.54 g. Calculate the density of the object (in g/mL) in order to determine if the object is pure lead. How to approach problem mass = 19.54 g. volume = (L) 1.2 cm * (W) 1.2 cm * (H) 1.2 cm density = mass/volume

(107 F-32) x5/9 = 42 C

A person with hyperthermia has a temperature of 107 ∘F. What does this read on a Celsius thermometer

3.5 ml

A physician has ordered 5.2x10-4 g atropine, intramuscularly. If atropine were available as 0.15 mg/mL of solution, how many milliliters would you need to give? (report your answer to 2 significant figures) 5.2x10^-4 g*(1000 mg/1 g)(1 ml/0.15 mg) =

compound

A pure substance made of two or more elements chemically combined

Element

A substance that cannot be decomposed into simpler substances by any chemical reaction.

1.6 g/ml

A thermometer containing 8.3 g of mercury has broken. If mercury has a density of 13.6 g/mL, what volume spilled? Report your answer in mL to 2 significant figures. density= mass/volume 13.6 g/ml= 8.3 g/volume (divide both sides by 8.3 g. and it will give you your volume.

atoms are neither created nor destroyed during a chemical reaction

According to the atomic theory, ________.

isotopes

Atoms with the same number of protons (same element) but different number of neutrons?

No, there is no need to phone the doctor.

Because high fevers can cause convulsions in children, the doctor wants to be called if a child's temperature goes over 40.0 ∘C∘C. Should the doctor be called if a child has a temperature of 102 ∘F∘F?

40 + 273.15 = 313.15 K

Convert 40 degree celsius to Kelvin

K= celsius +273.15

Converting Celsius to K

Heat of fusion or heat of vaporization

During a phase change use

decreases

Going from left to right across Period 4, the metallic character _______

increases

Going from left to right across Period 4, the number of valence electrons _______

3500 ms

How many milliseconds are in 3.5 seconds? 1 sec = 1000 ms

2, 3

Identify each of the following as describing a electron: Check all that apply. 1) is found in the nucleus 2) has a 1- charge 3) is attracted to the protons because of their charges 4) is attracted to the electrons because of their charges 5) has a mass about the same as a proton

1, 4, 5

Identify each of the following as describing a proton: Check all that apply. 1) is found in the nucleus 2) has a 1- charge 3) is attracted to the protons because of their charges 4) is attracted to the electrons because of their charges 5) has a mass about the same as a neutron

1, 5

Identify each of the following as describing a proton: Check all that apply. 1) is found in the nucleus 2) has a 1- charge 3) is attracted to the protons because of their charges 4) is attracted to the electrons because of their charges 5) has a mass about the same as a neutron

helium

Identify the noble gas in the following list. oxygen helium chlorine nitrogen gold

S

In Group 6A (16) 1) Na 2) Si 3) Mg 4) Ar 5) S 6) Cl

aluminum is metal

Is a shiny solid at room temperature, it conducts heat well and is often used while cooking or baking. It is found in group 3A and has it's valence electrons in the 3rd energy level. This element is classifies as a metal and it's identity is aluminum

Iodine is non metal

Is a solid at room temperature, it has low electrical conductivity and readily sublimes at slightly elevated temperatures. It is found in Group 7A and has it's valence electrons in the 5th energy level. This element is classified as a metal and it's identity is bromine .

(He) helium, (Ne) neon, (Ar) argon, (Kr) krypton, (Xe) Xexon, (Rn) radon and (Og) oganesson

Name the nobles gases

Volume and density

SI units is used for?

2022 J

Some homes that use baseboard heating use copper tubing. Hot water runs through and heats the copper tubing, which in turn heats aluminum fins. It is actually the aluminum fins that heat the air rising through the fins. How much energy would it take to heat a section of the copper tubing that weighs about 590.0 g , from 15.15 ∘C to 24.05 ∘C ? Copper has a specific heat of 0.3850 J/(g⋅∘C). SH= 0.3850 J/(g.C) Delta T = 24.05 C - 15.15 C Mass = 590.0 g. tubing q=(m)*(sh)*(delta T)

Nueroplasticity

The ability to make new and stronger connections between the neurons in our brain as we learn

protons

The atomic number of an atom is equal to the number of

State and phase

The classification of matter is determined by the?

are in the same group

The elements lithium, sodium, and potassium ________. are in the same group are isotopes of each other have the same mass number are in the same period of elements have the same number of neutrons

potential energy

The energy stored in molecular bonds is ________.

253. 3g

The heat equation, as given in the introduction, can also be rearranged to calculate the mass or temperature change for a substance. Follow the same steps used to calculate the quantity of heat gained or lost, but when you solve the equation, the term for mass or temperature change must be isolated on one side of the equation. What mass, in grams, of aluminum fins could 2022 J J of energy heat from 15.15 ∘C ∘C to 24.05 ∘C ∘C ? Aluminum has a specific heat of 0.897 J/(g⋅∘C). q= 2022 SH = 0.897 Delta T = 24.05 C - 15.15 C = 8.90 C 2022 J/(8.90 C * 0.897 J/ (g. C) = mass

500 grams

The heat of fusion for water is 80 cal/g. How many grams of solid water (ice) can be melted if 40 kcal of heat is absorbed? (80 cal/1g)(1 kcal/1000 cal) = 0.08 kcal/1 gram 40 kcal / (0.08 kcal/1 gram)

false

The proton is 2000 times the mass of the neutron. True False

atom

The smallest particle of an element that retains the characteristics of the element is a(n)

raise the temperature of 1 g of the substance by 1 °C

The specific heat of a substance is the amount of heat needed to ________.

in the outermost energy level of an atom

Valence electrons are electrons located ________. 1) in the outermost energy level of an atom 2) in the innermost energy level of an atom 3) in the first three shells of an atom 4) in the nucleus of an atom 5) throughout the atom

C

What is the symbol of the element in Group 4A (14) and Period 2?

Br

Which element would have physical and chemical properties similar to chlorine? S P O Br Ar

Most of them are liquids at room temperature

Which of the following properties is not a characteristic of the Group 1A (1) elements (alkali metals)? They are good conductors of electricity. 1) Most of them are liquids at room temperature. 2) They are shiny. 3) They are good conductors of heat. 4) They react vigorously with water.

boiling. melting and sublimation

Which of the following would be ENDOTHERMIC processes (processes where heat is absorbed)? Select ALL that apply. boiling freezing condensing melting deposition sublimation

Mixture

a material that can be separated by physical means into two or more substances

matter

anything that occupies space and has mass

10^-1

deci =

Si

electron arrangement 2,8,4 1) Cl 2) Ar 3) S 4) Na 5) Mg 6) Si

Ar

highest ionization energy 1) Ar 2) S 3) Si 4) Cl 5) Na 6) Mg

Na

largest atomic size 1) Cl 2) Na 3) Si 4) Ar 5) S 6) Mg

color, luster, hardness, melting point, density and conductivity

name some actions of physical change

Fe, Cu, AI, Ag, Pb, Au

name some properties of metals

atomic number

number of electrons in a neutral atom

the atomic and mass number

number of neutrons in an atom

mass number

number of particles in the nucleus

atomic number

number of protons in an atom

Chemical formula

the phase is written in parentheses after the

Mg

two valence electrons 1) Na 2) Si 3) S 4) Cl 5) Ar 6) Mg

L*W*H

volume =

100 degrees Celsius

water boils at what degrees

0 degree celsius

water freezes at what degrees