Chemistry

Question 1

what is an isotope?

Answer 1

An element with more or less neutrons, same amount of protons

Question 2

List the light rays from high to low energy. (7)

Answer 2

Radio,Micro,Infared, Visible light, ultraviolet, x, gamma

Question 3

What is a particle?

Answer 3

Smallest part of a substance (Atom or molucule)

Question 4

What is a Physical change?

Answer 4

Does not create new substances, can be a change of state

Question 5

What is a chemical reaction?

Answer 5

New chemical/substances, precipitate, odor, color, gas

Question 6

who are the four major players of atomic theory?

Answer 6

Dalton, Thompson,Rutherford and Bohr

Question 7

What did Dalton do?

Answer 7

Billiard ball model, Law of conservation of mass

Question 8

What did Thomson do?

Answer 8

Cathode ray tube, Plum pudding model

Question 9

What did Rutherford do?

Answer 9

Gold foil experiment, suggested nucleus

Question 10

What did Bohr do?

Answer 10

Energy levels, Energy lost in the form of light

Question 11

What goes in the center of a Bohr-Rutherford diagram?

Answer 11

Protons and neutrons.

Question 12

How to determine number of protons?

Answer 12

Atomic number

Question 13

How to determine number of neutrons?

Answer 13

Atomic mass-atomic number

Question 14

How to Calculate RAM? (relative atomic mass)

Answer 14

isotope mass times isotope abundance(%)

Question 15

What are radioisotopes?

Answer 15

Isotopes with a split nucleus and are radioactive

Question 16

Describe the trend of Atomic size on the periodic table

Answer 16

Decrease across, Increase down

Question 17

Describe the trend of Ionization energy on the periodic table

Answer 17

Increases across, Decreases down

Question 18

Describe the trend of Electron affinity on the periodic table

Answer 18

Increases across, decreases down

Question 19

Describe the trend of Electronegativity on the periodic table

Answer 19

Increases across, decreases down

Question 20

What is a Ionic compounds arrangement?

Answer 20

Stable octet

Question 21

What is covalent bonding?

Answer 21

When two non-metals share Valence electrons

Question 22

What are the three types of INTERmolecular forces(Between molecules)

Answer 22

Hydrogen bonds, dipole-dipole, london dispersion

Question 23

What are the two types of INTRAmolecular forces?(Between atoms within a molucule)

Answer 23

Ionic, Covalent

Question 24

If the difference in electronegativity of a bond is less than or equal to 0.4 then…

Answer 24

It is a non-polar covalent bond