relative mass

Question 1

Atomic Number(Z) ?

Answer 1

The number of protons in the nucleus of its atom .It identifies element

Question 2

Mass number (A) ?

Answer 2

The total number of protons and neutrons in the nucleus .

Question 3

Isotope ?

Answer 3

Atoms of the same element with different numbers of neutrons .

Question 4

Relative isotopic mass equation ?

Answer 4

Mass of one isotope / 1/12 X The mass of a carbon 12 atom

Question 5

Relative atomic mass (Ar)?

Answer 5

The average mass of one atom of an element / 1/12 x the mass of a carbon 12 atom

Question 6

Relative Molecular Mass (Mr)?

Answer 6

Average mass of one molecule / 1/12 x The mass of a carbon 12 atom

Question 7

How do you calculate relative molecular mass ?

Answer 7

Add all the Ar values

Question 8

How do you calculate the relative atomic mass ?

Answer 8

Isotopic masses percents/ total pecentage

Question 9

How do you calculate the relative formula mass ?

Answer 9

Add up all the Ar values of all the ions in the formula unit

Question 10

What is relative formula mass ?

Answer 10

Average mass of a formula unit on a scale where mass of a carbon 12 atom is exactly 12

Question 11

What is relative formula mass for ?

Answer 11

Ionic compounds and giant covelant compounds