Unit 3 Test

Question 1

what are the 7 metalloids?

Answer 1

boron[B], Silicon[Si], Germanium[Ge], Arsenic[As], Antimony[Sb], Tellurium[Te], Astatine[At]

Question 2

what group is right before the noble gases?

Answer 2

Halogens

Question 3

how do you find the % abundance for two isotopes?

Answer 3

(M-45 * x) + (M-42 * x - 1) = 43.21

Question 4

what group is hydrogen a part of?

Answer 4

none

Question 5

if you gain an electron the oxidation # is…

Answer 5

negative

Question 6

whats in the Nucleus?

Answer 6

neutron and proton

Question 7

atomic number

Answer 7

number of protons

Question 8

Mass number

Answer 8

rounded/ whole number

Question 9

atomic mass

Answer 9

decimal/ precise

Question 10

periodic law

Answer 10

when listed in order of atomic numbers they form groups of like elements

Question 11

amu

Answer 11

1/12 the mass of a C atom with the mass number 12

Question 12

period

Answer 12

horizontal rows

Question 13

groups/families

Answer 13

vertical columns similar chemical properties and for the representaive elements they have the name number of valance electrons

Question 14

Daltons five statements

Answer 14

1) all matter is made of atoms - indivisible and indistructable
2) atoms of given element are identical
3) atoms cannot be broken apart, created, or destroyed
4) atoms of diff elements can combine in small whole-number ratios to make compounds
5) chemical reactions combine, separate, or rearrange atoms

Question 15

Democritus

Answer 15

“atomos” cannot separate shaped weirdly

Question 16

John Dalton

Answer 16

first scientist atoms tiny balls, indivisable, rearrange to make diff things

Question 17

J.J. Thompson

Answer 17

discovered electrons, cathode ray, plum pudding model

Question 18

Ernest Rutherford

Answer 18

positive charge is all in the nucleus, gold foil

Question 19

Niels Bohr

Answer 19

electrons spin around the nucleus

Question 20

Robert Milken

Answer 20

oil drop, discovered charge of electrons

Question 21

Erwin Schrodinger

Answer 21

electrons buzz around the nucleus

Question 22

James Chadwick

Answer 22

discovered neutrons

Question 23

the halogen group is the only one with…

Answer 23

all three states of matter

Question 24

the only liquids are…

Answer 24

Mercury[Hg] and Bromine[Br]

Question 25

the first gases are..

Answer 25

Nitrogen[N], Oxygen[O], Chlorine[Cl], Krypton[Kr], Xenon[Xe], Radon[Rn], Oganesson[Og]

Question 26

Group 1

Answer 26

Alkali metals, Lithium[Li], Sodium[Na], Potassium[K], Rubidium[Rb], Cesium[Cs], Francium[Fr]

Question 27

Group 2(6 elements)

Answer 27

Alkaline earth metals, Beryllium[Be], Magnesium[Mg], Calcium[Ca], Strontium[Sr], Barium[Ba], Radium[Ra]

Question 28

Group 17(5 elements)

Answer 28

Halogens, Fluorine[F], Chlorine[Cl], Bromine[Br], Iodine[I], Astatine[At],

Question 29

Group 18(6 elements)

Answer 29

Noble Gases, Helium[He], Neon[Ne], Argon[Ar], Krypton[Kr], Xenon[Xe], Radon[Rn]