Question 1

Anything that has mass and takes up space

Accepted Answer

matter

Question 2

A substance that cannot be broken down into simpler substances

Accepted Answer

element

Question 3

Control center of the cell made up of protons and neutrons

Accepted Answer

nucleus

Question 4

Smallest particle of an element

Accepted Answer

atom

Question 5

positively charged particle

Accepted Answer

proton

Question 6

A small particle in the nucleus of the atom, with no electrical charge

Accepted Answer

neutron

Question 7

negatively charged particle

Accepted Answer

electron

Question 8

the number of protons in the nucleus of an atom

Accepted Answer

atomic number

Question 9

the sum of the number of neutrons and protons in an atomic nucleus

Accepted Answer

mass number

Question 10

Atoms of the same element that have different numbers of neutrons

Accepted Answer

isotopes

Question 11

an atom that gains or loses an electron and has a net electric charge

Accepted Answer

ion

Question 12

substance formed by the chemical combination of two or more different elements

Accepted Answer

compound

Question 13

the force that holds two atoms together

Accepted Answer

chemical bond

Question 14

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

Accepted Answer

covalent bond

Question 15

2 or more atoms held together by covalent bonds

Accepted Answer

molecule

Question 16

the attractive force between oppositely charged ions

Accepted Answer

ionic bond

Question 17

a bond formed by the attraction between positively charged metal ions and the electrons around them

Accepted Answer

metallic bond

Question 18

the process by which one or more substances change to produce one or more different substances

Accepted Answer

chemical reaction

Question 19

A homogeneous mixture of two or more substances where components cannot be distinguished

Accepted Answer

solution

Question 20

a solution containing a substance that produces hydrogen ions in water

Accepted Answer

acid

Question 21

a substance that produces hydroxide ions when dissolved in water

Accepted Answer

base

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