chemistry

Question 1

Atoms

Answer 1

the smallest unit of an element

Question 2

Molecules

Answer 2

a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance

Question 3

Substances

Answer 3

a particular kind of matter with uniform properties.

Question 4

Heterogeneous Mixtures

Answer 4

a mixture in which the composition is not uniform throughout the mixture

Question 5

Homogeneous Mixtures

Answer 5

contains two or more substances that are evenly distributed with each other

Question 6

Chemical Properties

Answer 6

a property of a substance that is observed when a substance undergoes a chemical change

Question 7

physical property

Answer 7

color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point

Question 8

Isotopes

Answer 8

Atoms with the same number of protons but different numbers of neutrons

Question 9

elements

Answer 9

a pure substance that cannot be broken down into simpler substances by ordinary chemical means

Question 10

Compounds

Answer 10

a thing that is composed of two or more separate elements; a mixture.

Question 11

Reactants

Answer 11

a substance that takes part in and undergoes change during a reaction.

Question 12

products

Answer 12

an article or substance that is manufactured or refined for sale.

Question 13

Hydrogen Bonds

Answer 13

a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom

Question 14

Covalent Bonds

Answer 14

the inter atomic linkage that results from the sharing of an electron pair between two atoms

Question 15

Ionic Bonds

Answer 15

type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound

Question 16

Cation

Answer 16

a positively charged ion, i.e. one that would be attracted to the cathode in electrolysis.

Question 17

Anion

Answer 17

a negatively charged ion, i.e. one that would be attracted to the anode in electrolysis.

Question 18

Periodic Table-Groups

Answer 18

Groups are numbered 1–18 from left to right

Question 19

table groups

Answer 19

a single component that contains many tables, each with its own unique data

Question 20

pH scale

Answer 20

It is a logarithmic scale used to specify the acidity or basicity of aqueous solutions

Question 21

Acids

Answer 21

A chemical that gives off hydrogen ions in water and forms salts by combining with certain metals

Question 22

Bases

Answer 22

plural form of base