Chemistry 11 Vocabulary

Question 1

Smallest particle that is still considered matter. Known as the building block of matter.

Accepted Answer

atom

Question 2

The type of reaction that produces energy where the reaction feels warm.

Accepted Answer

exothermic

Question 3

Columns on the periodic table. Helps you know the # of valence electrons. Similar properties.

Accepted Answer

groups

Question 4

A mixture/solution that is Evenly Mixed. One sample looks like another sample.

Accepted Answer

homogeneous

Question 5

Rows on the periodic table. Helps you know the # of electron shells/energy levels.

Accepted Answer

periods

Question 6

The negatively charged subatomic particle found in shells, energy levels, or the cloud.

Accepted Answer

Electon

Question 7

The center of the atom that is made of protons and neutrons. It contains the mass of the atom.

Accepted Answer

Nucleus

Question 8

The high energy electrons in the outermost shell that are reactive within an element.

Accepted Answer

Valence

Question 9

The subatomic particle that is Neutral or has no charge and is worth 1 AMU.

Accepted Answer

Neutron

Question 10

The purest form of a substance having just one type of atom found on the periodic table.

Accepted Answer

element

Question 11

The Positively charged subatomic particle that is worth 1 AMU.

Accepted Answer

Proton

Question 12

The type of reaction that requires energy and produces a reaction that feels cool.

Accepted Answer

endothermic

Question 13

Anything that has mass and takes up space.

Accepted Answer

matter

Question 14

An atom that becomes charged due to gaining (-) or losing (+) an electon.

Accepted Answer

Ion

Question 15

A change that creates a new substance with different properties than what it was made from.

Accepted Answer

Chemical Change

Question 16

Matter that is physically combined and can vary in composition from one sample to the next.

Accepted Answer

mixture

Question 17

A substance that contains atoms of 2 or more elements chemically bonded in a specific ratio.

Accepted Answer

compound

Question 18

Matter cannot be created, cannot be destroyed, only transformed into another form.

Accepted Answer

Law of Conservation of mass

Question 19

A mixture that is Not Evenly Mixed and varies from sample to sample.

Accepted Answer

heterogeneous

Question 20

A change that does not change the properties of matter.

Accepted Answer

Physical Change

Questions 20