Atomic structure

Question 1

Light

Answer 1

Electromagnetic radiation, a wave of oscillating electric and magnetic fields

Stream of particles called photons

Question 2

Speed of light

Answer 2

3.00 x 10^8 m/s

Question 3

Characteristic pattern of wavelengths absorbed or emitted by a substance

Answer 3

Spectrum

Question 4

Emission spectrum

Answer 4

Spontaneous emission of radiation from an excited atom or molecule

Question 5

Line spectrum

Answer 5

Spectrum containing only certain wavelengths

Question 6

Photon

Answer 6

Quantum of energy

Question 7

Plancks constant

Answer 7

6.63 x 10^-34 Jxs

Question 8

Form of matter that has a definite composition and distinct properties, can be either elements or compounds

Answer 8

Substance

Question 9

States of matter

Answer 9

Solid
Liquid
Gas

Can be interconverted without changing the chemical composition of the compound.

Question 10

Substance that cannot be separated into simpler substances by chemical means

Answer 10

Element

Question 11

A substance composed of atoms of two or more elements chemically united in fixed proportions

Answer 11

Compound

Question 12

Combination of two or more substances in which they retain their distinct identities

Answer 12

Mixture

Question 13

Measure if the amount of matter in an object or sample

Answer 13

Mass

Question 14

Average kinetic energy of an object

Answer 14

Temperature

Question 15

The ratio of mass to volume

m/v

Answer 15

Density

Question 16

After this the original substance will not exist, what remains is a different substance

Answer 16

Chemical change

Question 17

State of matter changes but not the identity of the substance

Answer 17

Physical change

Question 18

Measured and expressed with a number

Answer 18

Quantitative

Question 19

Not requiring explicit measurement

Answer 19

Qualitative

Question 20

Depends on the amount of matter

Answer 20

Extensive property

Question 21

Does not depend on the amount of matter

Answer 21

Intensive property

Question 22

How close a measurement is to the true or experimental value

Answer 22

Accuracy

Question 23

Tells us how close multiple measurements are to one another

Answer 23

Precision

Question 24

Fraction in which the same quantity is expressed one way in the denominator and another way in the numerator

Answer 24

Conversion factor

Question 25

The study of matter and the changes that matter undergoes

Answer 25

Chemistry

Question 26

If two elements can combine to form more than one compound with each other, the masses of one element that combined with a fixed mass of the other element are in ratios of small whole numbers

Answer 26

Law of definite proportions

Question 27

Matter can be neither created nor destroyed

Answer 27

Law of conservation of mass

Question 28

Spontaneous emission of energy from the nucleus of an emission

Answer 28

Radioactivity

Question 29

Negatively searched particles inside the atom

Answer 29

Electrons

Question 30

Basic unit of an element that can enter into a chemical combination

Answer 30

Atom

Question 31

The emission of energy

Answer 31

Radiation