Duplicate of Unit 2

Question 1

An atom has 9 protons, 9 electrons,and a mass # of 17. How many neutrons does the atom have?

Accepted Answer

8

Question 2

How many protons?

Accepted Answer

18

Question 3

How many electrons can fit in the 3rd energy level?

Accepted Answer

18

Question 4

His gold foil experiment found an atom was mostly empty space with a positive-charged nucleus.

Accepted Answer

Rutherford

Question 5

What is the noble gas (shorthand) electron configuration for palladium (Pd)?

Accepted Answer

[Kr] 5s24d8

Question 6

What does the number 39 represent in Potassium-39?

Accepted Answer

mass number

Question 7

What charge does oxygen have when it becomes an ion?

Accepted Answer

2-

Question 8

Which element has an electron configuration of 1s22s22p63s23p3?

Accepted Answer

Phosphorus

Question 9

To which group of the periodic table do magnesium and calcium belong?

Accepted Answer

alkaline earth metals

Question 10

What is the term for 2 or more atoms of the same element with different numbers of neutrons?

Accepted Answer

isotope

Question 11

How many valence electrons does phosphorus have?

Accepted Answer

5

Question 12

Which of the following elements has thelargest electronegativity? Bi, Si, Cd, S

Accepted Answer

S

Question 13

How many electrons does Ca2+have?

Accepted Answer

18

Question 14

Who discovered the neutron?

Accepted Answer

Chadwick

Question 15

What is the name for Group 17?

Accepted Answer

Halogens

Question 16

Which element on the periodic table has the largest atomic radius? Fr, Rn, Fe or Xe?

Accepted Answer

Francium

Question 17

Which reason explains why atomic radius generally increases with atomic number in each group?

Accepted Answer

The number of energy levels increases

Question 18

Who quantified the charge of an electron?

Accepted Answer

Millikan

Question 19

What is the noble gas (shorthand) electron configuration for Tin (Sn)?

Accepted Answer

[Kr] 5s24d105p2

Question 20

Which of the following elements has the largest atomic radius? Na, Si, Be, or Li?

Accepted Answer

Na

Question 21

This is an orbital box diagram for which element?

Accepted Answer

Aluminum

Question 22

Which of the following elements has the largest ionization energy? Bi, Si, Cd, S

Accepted Answer

S

Question 23

Which atom has 6 protons and 6 electrons?

Accepted Answer

Carbon

Question 24

The mass of a proton is

Accepted Answer

about the same as a neutron

Question 25

What is the electron configuration for Scandium (Sc)?

Accepted Answer

1s22s22p63s23p64s23d1

Question 26

What is the maximum number of electrons in an orbital of any atom?

Accepted Answer

2

Question 27

What is the term for an atom that loses or gains electrons?

Accepted Answer

ion

Question 28

How many neutrons does this chlorine atom have?

Accepted Answer

18

Question 29

Who used a cathode ray tube that founded electrons in atoms?

Accepted Answer

Thomson

Question 30

400 B.C.--Believed in the "uncutable" particle

Accepted Answer

Democritus

Question 31

What is the total number of orbitals in the p sublevel of an atom?

Accepted Answer

3

Duplicate of Unit 2

Questions 31

Duplicate of Unit 2

Questions 31