ch.2 Atomic and Elements

Question 1

what is 1/2 mass of a carbon atom with 6 protons and 6 neutrons called?

Answer 1

Atomic mass Unit (u)

Question 2

Atomic #=Number of electrons

Answer 2

Neutral Atom

Question 2

What is the number of protons in the nucleus called?

Answer 2

Atomic Number (Z)

Question 2

Atoms with different number of mass units (A) but same Atomic Number (Z) is called?

Answer 2

Isotopes

Question 2

of Protons + # of Neutrons

Answer 2

Mass Number (A)

Question 2

what is an number of unequal number of protons and electrons called?

Answer 2

Ion

Question 2

The average mass of all naturally occurring isotopes is called?

Answer 2

Atomic weight

Question 3

Atomic mass Formula=

Answer 3

(% of abundance of isotope 1/100) * Mass of isotope 1 +( % of abundance of isotope 2/100) * mass of isotope 2

Question 4

vertical columns on periodic table

Answer 4

groups

Question 5

horizontal rows that repersent trends?

Answer 5

periods

Question 6

how many groups are there in total

Answer 6

18

Question 7

how many periods are there in total

Answer 7

7

Question 8

Group 1A contains

Answer 8

Alkali metals

Question 9

2A contains

Answer 9

Alkaine Earth metals

Question 10

6A Contains

Answer 10

Chalcogens

Question 11

7A contains

Answer 11

Halogens

Question 12

8A contains

Answer 12

Noble gases