Lesson 4- Atoms and Ions

Question 1

Atoms

Answer 1

the basic unit of the chemical element

Question 2

3 subatomic particles of an atom

Answer 2

1. protons (p+)
2. electrons (e-)
3. neutrons (n)

Question 3

Atomic number Equals the

Answer 3

number of protons
(eg.

Question 4

Do atoms have a charge?

Answer 4

No

Question 5

the number of protons equal the number of:
a) electrons
b) protons
c) neutrons

Answer 5

A) electrons: because the number of positive numbers equal the number of negative particles

Question 6

Energy level diagrams

Answer 6

• communicates the number of electrons in each energy level

Question 7

how many electrons are in the different energy levels

Answer 7

1st energy level= 2
2nd energy level= 8
3rd energy level= 8

Question 8

what happens once the energy level is full

Answer 8

electrons begin to fill the next level

Question 9

how do the sodium atom energy levels look like, (doing down)

Answer 9

NA
-2e-
-8e-
-1-

Question 10

Mass number

Answer 10

determined by adding number of protons and neutrons

Question 11

mass number =

Answer 11

protons + neutrons

Question 12

how is mass number communicated (3 ways)?

Answer 12

1. add the number of p and n
   2.in the element name
2. Rounding the atomic molar mass

Question 13

Mass number of calcium?

Answer 13

41

Question 14

number of protons in aluminum?

Answer 14

13

Question 15

amount of neutrons in sulfur?

Answer 15

16

Question 16

Isotope

Answer 16

atoms of the same element have different mass. protons of element never change, number of neutrons differ

Question 17

ionization

Answer 17

atoms seek to fill outer energy level by gaining or losing eletrons

Question 18

why are noble gases unreactive?

Answer 18

they have a full valence shell

Question 19

positive or negative charged particles are called

Answer 19

IONS

Question 20

CATion

Answer 20

metals lose electrons to form positive ions

Question 21

ANion

Answer 21

nonmetals gain electrons to form negative ions