Module 2.1 Atomic Structure

Question 1

Large central mass of an atom is called ?

Answer 1

Nucleus

Question 2

What are the two types of particles in an atom

Answer 2

Protons & Neutrons

Question 3

Protons have ? charge

Answer 3

Positive Charge

Question 4

Neutrons have ? charge

Answer 4

No Charge

Question 5

The very low mass particles orbiting around the nucleus are called ?

Answer 5

Electrons

Question 6

Electrons have ? charge

Answer 6

Negative Charge

Question 7

The atomic number is the ?

Answer 7

Smaller number associated with each element on the periodic table, is also the #of Protons

Question 8

²³Na₁₁

What does ₁₁ represent

Answer 8

Proton & the atomic number

Question 9

²³Na₁₁

What does ²³ represent

Answer 9

mass number / atomic weight

Question 10

²³Na₁₁

What is the charge of this atom

Answer 10

No charge shown so this is an atom (uncharged particle)

₁₁= +Protons, because it is uncharged we no that there has to be ₁₁ - Electrons to be net 0 charge

Question 11

²³Na₁₁

What makes up the mass/atomic weight of this atom (the 23)

Answer 11

P & #N as Electrons have little to no mass

Question 12

²³Na ⁺¹ ₁₁

This is called ?

Answer 12

A ion

Question 13

A ion is

Answer 13

a charged particle (⁺ ⁻) that is formed when an atom gains or loses one or more electrons

Question 14

²³Na ⁺¹ ₁₁

What is the # of +P, N, & -E

Answer 14

P = +11

E= -10 (we know that there is 1 more positive charge to this ion making P technically +12

N= 12

P= + 11
E= - 10
—————
Charge +1

Question 15

¹⁶ O⁻² ₈

What is the # of +P, N, & -E

Answer 15

P= +8

N= 8

E= -10

Charge = -2 ( P-E)

Question 16

P= 19

E= 18

N= 20

Answer 16

³⁹K⁺¹₁₉

Once you know P look up in periodic table to find element, then we see that there is one more positively charged P than E so ⁺¹ charge

Question 17

P= 17

E= 18

N= 18

Answer 17

³⁵Cl ⁻¹ ₁₇

Know P find on periodic table

One less P than E so -1 charge

P + N = Mass # / Atomic Weight