Module 3

Question 1

Chemistry

Answer 1

The study of matter and its interactions

Question 2

Element

Answer 2

Pure substance that can not be chemically broken down (92 naturally occurring)

Question 3

Atom

Answer 3

The smallest particle of an element that still retains its chemical properties

Question 4

Atomic nucleus

Answer 4

Contains two subatomic particles

Question 5

Protons

Answer 5

Carry positive (+) charge

Question 6

Neutrons

Answer 6

Uncharged

Question 7

Electrons

Answer 7

Negatively charged (moves around the nucleus)

Question 8

Atomic number

Answer 8

Number of protons (Unique to each atom)

Question 9

Mass number

Answer 9

Number of protons and neutrons

Question 10

Half life

Answer 10

Amount of time it takes for half or the atoms to give off radiation

Question 11

Electron shell

Answer 11

Electrons if similar energy

Question 12

Octer rule

Answer 12

Atoms gain, lose, or share electrons to fill the outermost shell

Question 13

Chemical bond

Answer 13

Attractive force between two atoms

Question 14

Molecule

Answer 14

Two or more atoms chemically joined

Question 15

Compound

Answer 15

Molecule made up of two or more different elements

Question 16

Cation

Answer 16

Positively charged ion (more protons)

Question 17

Anion

Answer 17

Negatively charged ion (more electrons)

Question 18

Covalent Bonds

Answer 18

Bond that forms when atoms share electrons

Question 19

Nonpolar covalent bond

Answer 19

Two identical atoms share electrons equally

Question 20

Hydrogen bond

Answer 20

Weak attraction between opposite charges on adjacent polar covalent molecules (water)

Question 21

Energy

Answer 21

The capacity to do work

Question 22

Potential energy

Answer 22

Energy of position, stored energy

Question 23

Kinetic energy

Answer 23

Energy of motion

Question 24

Reactants or Substrates

Answer 24

Substances that present at the start of the reaction

Question 25

Products

Answer 25

Substances left at the end of the reaction

Question 26

Synthesis reaction

Answer 26

Small molecules are used to build bigger ones

Question 27

Decomposition reaction

Answer 27

Larger molecules are broken down to smaller molecules

Question 28

Exchange reaction

Answer 28

Atoms are exchanged, both synthesis and decomposition

Question 29

Activation energy

Answer 29

Amount of energy required to start a reaction