1st Quarter

Question 0

Scientific method

Answer 0

Observation question hypothesis experiment conclusion

Question 1

Density formula

Answer 1

Density equals mass over volume

Question 2

Significant figures

Answer 2

Atlantic right side and Pacific left side

Begin counting the number of the first nonzero number
Then keep counting

Question 3

Percent error formula

Answer 3

Measured value minus expected value divided by expected value times 100

Question 4

Physical properties and changes

Answer 4

A physical properties that a property that can be observed

A change that does not alter the chemical make up of a substance

Question 5

Chemical properties and changes

Answer 5

Describes a chemical change that a substance will or will not undergo under certain conditions

Chemical changes produce new substances with the new properties

Question 6

Law of conservation of mass

Answer 6

Matter cannot be created nor destroyed

Question 7

Substance

Answer 7

Homogenous an element or compound

Question 8

Mixtures

Answer 8

Can be homogeneous and heterogeneous

Question 9

Three methods of separating mixture

Answer 9

Filtration is separates solids from liquids

Distillation separates based on boiling point

Chromatography relies on different Billy the components to diffuse through material

Question 10

Protons

Neutron

Electrons

Answer 10

Proton positive neutrons neutral electron negative

Question 11

Atomic number

Answer 11

Is the number of protons in and Atoms nucleus

Question 12

Mass number

Answer 12

Some of protons neutrons

Question 13

Isotopes

Answer 13

Are two atoms that have the same number of protons and different number of neutrons

Question 14

Atomic mass

Answer 14

Is a weighted average based on the abundance of each isotope

Question 15

Average isotopic mass

Answer 15

Multiply add and then divided by hundred

Question 16

The ground state versus excited state

Answer 16

The ground state is listed on the periodic table

The excited state is when an electron absorbs energy in a jumps to the excited state

Question 17

Spectral lines

Answer 17

When electron falls on the excited state to the grand see in a minute light energy in the form of spectral lines

Question 18

Valence electrons

Answer 18

Are the electrons in the outer most energy level