Chemistry

Question 1

Two or more forms of a chemical element with the same atomic numbers (same number of protons), but different numbers of neutrons (different atomic weight)

Answer 1

Isotope (n)

Question 2

The chemical process of reacting with oxygen

Answer 2

Oxidation (n)

Question 3

Elements with similar properties, (vertical columns in the periodic table)

Answer 3

(Periodic) Group (n)

Question 4

A horizontal line in the periodic table

Answer 4

Period (n)

Question 5

Something with a pH balance greater than 7

Answer 5

Alkaline (n)

Question 6

A periodic group that includes the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)

Answer 6

Halogen (n)

Question 7

A periodic group that includes the elements helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and element 118

Answer 7

Noble gases (n)

Question 8

A chemical element that has properties between metal and nonmetal (neither metal nor nonmetal)

Answer 8

Metalloid (n)

Question 9

A combination of substances that are not the same

Answer 9

Heterogenous (adj)

Question 10

A combination of substances that are the same

Answer 10

Homogenous (adj)

Question 11

A substance that cannot be separated

Answer 11

Element (n)

Question 12

A substance formed from two or more elements

Answer 12

Compound (n)

Question 13

A substance that dissolves another

Answer 13

Solvent (n)

Question 14

A substance that is dissolved by another

Answer 14

Solute (n)

Question 15

Separating a mixture by using liquid, gas, or alcohol

Answer 15

Chromatography (n)

Question 16

A substance that is mixed with another substance without chemical change

Answer 16

Solution (n)

Question 17

Visible to the eye, big stuff

Answer 17

Macroscopic (adj)

Question 18

Invisible to the eye, small stuff

Answer 18

Microscopic (adj)

Question 19

Invisible to microscopes, extremely small stuff

Answer 19

Submicroscopic (adj)

Question 20

Makeup, the way something is formed

Answer 20

Composition (n)

Question 21

Properties that depend on the amount of matter

Answer 21

Extensive (adj)

Question 22

Properties that do not depend on the amount of matter

Answer 22

Intensive (adj)

Question 23

An electronically charged atom

Answer 23

Ion (n)

Question 24

Having two atoms in the molecule

Answer 24

Diatomic (adj)

Question 25

The arrangements of the parts of a thing

Answer 25

Configuration (n)

Question 26

The smallest quantity of some physical quality (matter or energy)

Answer 26

Quantum (adj)

Question 27

Moles

Answer 27

a standard scientific unit for measuring large quantities of an atoms, molecules (6.02 × 10²³⁾

Question 28

Concentration

Answer 28

The amount of solute contained within a given volume.

C = n/V

• C: concentration (M or mol dm-3 or mol L-1)
• n: amount of substance (mol)
• V: volume of the solution (dm3 or L)

Question 29

Subscripts

Answer 29

The number on the lower right of a element or compound. This shows how many atoms are in a element or compound.

Question 30

Excess reactant

Answer 30

the substance that takes part in the reaction and has extra amount needed to react

Question 31

Coefficient ( in a balanced equation)

Answer 31

The number in front of a substance. The number shows you the ratios of molecules / atoms of each and the ratio of moles.

Question 32

Reactant

Answer 32

The starting substance(s). The original substance before changing due to any chemical reactions.

Question 33

Percent Yield

Answer 33

The ratio of the actual yield to the theoretical yield

Question 34

Dilution

Answer 34

The action of making the liquid more dilute (example: add more water or any solvent into the solution)

Question 35

Empirical formula

Answer 35

a formula that shows the ratio of elements present in the compound.

Question 36

Limiting reactant

Answer 36

The reactant/substance which would totally be comsumed when the chemical reaction is complete