ATOMS
CHANGE OF STATE
PHYSICAL & CHEMICAL CHANGES
MOLECULES
GENERAL
100

What part of an atom has a positive charge and what part of an atom has a neutral charge?

Protons - positive

Neutron - neutral

100

Change of state is an example of a ____________ change

Physical

100

Is a piece of clay molded into a teddy bear a physical or chemical change?

Physical

100

Atoms in a molecule are _________________ joined

Chemically

100

The amount of space an object takes up is called

_______________

Volume

200

_______________ have negative charges and arrange themselves in around the _______________

Electrons

Nucleus

200

Process of a solid changing to a liquid is _______________

Melting

200

Evaporation is a substance changing from a ___________ to a _________?

Liquid to a Gas

200

How many elements in the following NaCl

2 - Na - sodium, Cl - chlorine

200

A combination of different substances that are not chemically joined ______________

Mixture

300

Two or more atoms chemically combined are called __________________

Molecules or Compounds

300

Water droplets forming on the outside of a cold bottle is an example of ______________

Condensation

300

What state of matter has a fixed volume but a shape that varies?

Liquid

300

How many atoms in the following H2SO4

7

300

Why does oil float on water

Oil is less dense than water

400

Elements are made from the same type of _____________

Atoms

400

The process of water changing to a gas is called ______________

Evaporation

400

The rusting of iron is an example of a ___________ change

Chemical

400

Which of the following is NOT a molecule: 

N2; H2O2; HCl


N2

400

When particles move from an area of high concentration to an area of low concentration

Diffusion

500

True or False: the number of protons in an atom = the number of electrons.

True

500

When a gas changes to a solid without going through the liquid phase.

Deposition

500

Why is the burning of paper and the scrunching of paper 2 different types of changes

Burning paper - new substance is formed, 

Scrunching paper - no new substance formed

500

True or False:

There are more elements in the world than there are molecules

False

500

What happens to particles in a liquid when it is cooled - 2 things.

Lose energy, move more slowly