Duplicate of Matter

Question 1

In chemistry, the periodic table shows that elements are represented by . . .

Accepted Answer

Symbols

Question 2

2 or more atoms of different elements can bond together to form a single unit called a(n)

Accepted Answer

Compound

Question 3

One example of a chemical change is . . .

Accepted Answer

Burning gasoline in an engine

Question 4

Which is not an element?

Accepted Answer

Water

Question 5

An element's atomic number is the same as. . .

Accepted Answer

How many protons are in the nucleus

Question 6

Anything that has mass and takes us space is. . .

Accepted Answer

Matter

Question 7

One example of a physical change is

Accepted Answer

Mixing powdered drink mix to make lemonade

Question 8

How many atoms does a molecule of C3H8 have?

Accepted Answer

11

Question 9

Which is NOT a sign of a chemical reaction?

Accepted Answer

Phase change from gas to liquid

Question 10

Which sub-atomic particles have a negative charge?

Accepted Answer

Electrons

Question 11

How many neutrons are in the element potassium (K)?

Accepted Answer

20

Question 12

Which of the following is a basic unit of matter?

Accepted Answer

Atom

Question 13

The Law of Conservation of Mass says

Accepted Answer

Matter cannot be created or destroyed during a reaction.

Question 14

Since water can't be physically broken down into its component parts it is a(n). . .

Accepted Answer

compound

Question 15

Sugar water is a(n). . .

Accepted Answer

Mixture

Question 16

How many neutrons does an atom of Hydrogen have?

Accepted Answer

0

Question 17

The atomic mass of an element tells you. . .

Accepted Answer

How many protons + neutrons an atom has.

Question 18

Which process changes matter into one or more new substances with new properties?

Accepted Answer

Chemical Change

Question 19

Water vapor in the air turns to liquid water in the form of rain. This is an example of

Accepted Answer

Physical change

Question 20

Which sub-atomic particles are found in the nucleus of an atom?

Accepted Answer

Protons

Questions 20