Chem Unit 2 Review

Question 1

B:. (3 dots) is the dot diagram for which element?

Accepted Answer

Boron

Question 2

What element is in period 4, group 12?

Accepted Answer

Zinc

Question 3

An ion has/is

Accepted Answer

more or less electrons than normal

Question 4

What is the charge of an atom that has gained two electrons?

Accepted Answer

2-

Question 5

A proton has approximately the same mass as

Accepted Answer

a neutron

Question 6

An isotope has/is:

Accepted Answer

more or less neutrons than normal

Question 7

Compared to the charge and mass of a proton, an electron has

Accepted Answer

an opposite charge and a smaller mass

Question 8

What is the highest electron level used for Barium?

Accepted Answer

6

Question 9

How many electrons does an oxygen atom have in its outer most shell?

Accepted Answer

6

Question 10

Which group of the periodic table contains elements that are all gases?

Accepted Answer

18

Question 11

How many electrons does a stable atom of nitrogen have?

Accepted Answer

7

Question 12

What element has 5 electrons in its out shell and an atomic number less than that of Neon?

Accepted Answer

Nitrogen

Question 13

What is the location (group and period) of O-15?

Accepted Answer

16, 2

Question 14

What is the total number of ALL subatomic particles in the nucleus of C-13?

Accepted Answer

13

Question 15

The identity of an element is determined by...

Accepted Answer

the number of protons.

Question 16

Atoms with the same atomic number but different atomic masses are called:

Accepted Answer

isotopes

Question 17

What is the mass number of an atom, which contains 28 protons, 28 electrons and 34 neutrons?

Accepted Answer

62

Question 18

An ion with 5 protons, 6 neutrons, and a charge of 3- has how many electrons?

Accepted Answer

8

Question 19

What is the difference between a strontium atoms and a strontium ion?

Accepted Answer

the number of electrons

Question 20

Boron and Silicon are similar in that they both

Accepted Answer

are metalloids

Question 21

Which atom contains exactly 15 protons?

Accepted Answer

P-32

Question 22

The Bohr condensed electron configuration for Copper is

Accepted Answer

2 8 17 2

Questions 22