3.2 How Atoms Change

Question 0

Most stable elements

Answer 0

Gases: helium, neon, argon

Question 1

Compound

Answer 1

Substance that is composed of atoms of two or more different elements that are chemically combined

Question 2

Chemical Bonds

Answer 2

Forces that hold the elements together

Question 3

Nucleus of each atom contains…

Answer 3

One proton with a positive charge & two positive charged protons attract the two negatively charged electrons

Question 4

Covalent Bond

Answer 4

Attraction of two atoms for a shared pair of electrons that holds the atoms together

Question 5

Molecule

Answer 5

Composed of two or more atoms held together by covalent bonds

Question 6

Polar bond

Answer 6

Has a positive an negative end

Question 7

Ion

Answer 7

An atom that gains or loses an electron

Question 8

Ionic Bond

Answer 8

Attractive force between two ions of opposite charges

Question 9

Chemical Reaction

Answer 9

The change of one or more substances into other substances

Question 10

Mixture

Answer 10

Combination of two or more components that return their identities

Question 11

Heterogeneous

Answer 11

Mixtures’ components

Question 12

Solution

Answer 12

Liquid, solid, or gas

Question 13

Acid

Answer 13

Solution containing a substance that produces hydrogen ions (H+) in water

Question 14

Most Common Acid

Answer 14

Carbonic acid

Question 15

Bases

Answer 15

Produces hydroxide ions (OH-) in solution

Can neutralize an acid
[(H+) + (OH-)]=H2O

Question 17

pH Scale

Answer 17

Acidic- below 7
Neutral- 7
Basic- over 7