Physical Science

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What is the molarity of 15 grams of NaF dissolved in a total volume of 2 liters?

0.18 M

Johnt'e adds 4.1 moles of sugar and wants to make a 0.25 M solution with it, what will be the final Volume of solution?

16.4 l

How many valance electrons are in the outermost shell of Strontium (Sr, atomic number 38)

2

Argon has an atomic number of 18. How many neutrons does it have?

22

A 5 kg ball rolls at a constant speed of 30 m/s. Determine the kinetic energy of the ball.

2250 J

What is the electronegativity of this element? Cl?

3.16

A 15 kg car has a velocity of 2.0 m/s. Find the kinetic energy of the car.

30 Joules

The Atomic mass of Rubidium is 86. How many electrons does it have?

37

How many electrons are in the outermost shell of phosphorous (P, atomic number 15)?

5

The element that has 20 protons in its nucleus is called

Calcium

A reaction that removes energy from a system is called an exothermic reaction. True/False

False

Name the element with atomic number 12.

Magnesium

Who developed the periodic table of the elements?

Mendeleev

The rows from left to right, in the periodic table that classify elements based on their energy levels are called what

Periods

If a sulfur atom gained 3 protons what atom would be formed?

Potassium

Change in velocity divided by time is equal to

acceleration

Which of the following elements is not a transition metal?

actinium

The number of protons plus neutrons is called the

atomic mass

Elements in the periodic table are listed in order of

atomic number

What speeds up the rate of a reaction?

catalyst

A positively charged ion is called a/an

cation

Atoms that share electrons, do so with what type of bond?

covalent bond

Oxygen has 8 protons with an atomic number of 8. It has the same number of what?

electrons

The chemical properties of matter comes mostly from its

electrons

Pure substance that cannot be broken down into smaller substances chemically or physically

element

Which element has the largest electronegativity?

fluorine

Spinning a rock at the end of a string and it follows a circular path. If the string breaks, the rock will

follow a straight line path

Which of these forces opposes an object's motion?

friction

Concentration is measured in what?

g/L

Each vertical column of the periodic table

group

The top to bottom columns of the periodic table are called

groups

As atoms get heavier, they become smaller in size because

heavier atoms have more protons to pull electrons closer to nucleus

Two or more atoms of an element that have different atomic masses but the same number of protons (different number of neutrons) is called what?

isotopes

Uranium 235, Uranium-238, and Uranium 239 are different

isotopes

All of the following are types of potential energy except,

kinetic

An object stays in motion because of its

mass

Anything that has mass and takes up space

matter

Energy due to an objects position or motion is called

mechanical energy

A hard solid that is malleable, ductile and a great conductor of heat and electricity is called a/an

metal

Which of the following are electrically neutral?

neutron

Protons and what are found in the center of an atom?

neutrons

The atomic mass( in the nucleus) is equal to the number of protons and what other subatomic particle

neutrons

An element that is usually a gas or a brittle (weak) solid, not malleable or ductile and a poor conductor of electricity is a

non metal

The period number of an element is also equal to the number of what?

orbitals

Each horizontal row in the periodic table is called a

period

A table showing the elements arranged in order by atomic number

periodic table

The nucleus has what type of charge?

positive

Energy that an object has due to its position or arrangement

potential energy

How did the energy of the rock at the top of the cliff change by the time it reached the bottom?

potential energy changed to kinetic energy

Which of the following are electrically positive?

proton

Which of the following are located within the nucleus?

proton

The weight of matter comes mostly from its

protons

The atomic number is also equal to the number of

protons and electrons

Force is a vector quantity because it has

size and direction

Which of the following elements is a halogen

tennessine

The outermost electrons of an element are called

valence electron

An object's force times its displacement is known as its

work


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