HMH Chemistry

Which particle contributes the negative charge to the atom?

• proton

• electron

• neutron

• nucleus

A molecule is

• a singular particle of a particular element

• another name for an element

• 2 or more atoms that are combined

Tags

NGSS.MS-PS1-1

A pure substance that is a compound is made out of

• particles of more than one type of atom

• particles of the same type of atom

• a mixture of two or more substances that can be physically separated

Tags

NGSS.MS-PS1-1

"C" is the element symbol for which element?

• calcium

• carbon

• chlorine

• cadmium

A _________ is a substance made of two or more DIFFERENT elements chemically combined. 

• mixture

• compound

• substance 

Tags

NGSS.MS-PS1-1

What is the atomic number of this element?

• 20

• 60

• 40

• 41

Tags

NGSS.MS-PS1-1

Label the metals, nonmetals and metalloids

a

b

c

d

metals

metals

nonmetals

metalloids

Identify which are the products and reactants

a

b

products

reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states that

• compounds and elements are the same

• elements can be destroyed

• matter cannot be created or destroyed, but can be transformed

• mass is the same for all the objects if they need to exist

Tags

NGSS.MS-PS1-5

How is a chemical change different from a physical change?

• there is no difference

• a physical change creates a new substance

• a chemical change creates a new substance

Tags

NGSS.MS-PS1-2