Chapter 1 Atomic Structure

Question 1

Relative mass and charge of proton

Answer 1

RM - 1

Charge = +1

Question 2

Relative mass and charge of neutron

Answer 2

RM - 1

Charge - 0

Question 3

Relative mass and charge of electron

Answer 3

RM - 1/1840

Charge = -1

Question 4

Why do isotopes have same chemical properties ?

Answer 4

Same no. and arrangement of electrons.

Question 5

Why do isotopes have different physical properties?

Answer 5

Different no. of neutron so different masses.

Question 6

What is relative atomic mass in terms of carbon 12 ?

Answer 6

Average mass of an atom of an element to 1/12 the mass of an atom of carbon 12.

Question 7

What r all atoms measured relative to ?

Answer 7

To the mass of carbon 12 which is 12.0000 given to 4 d.p.

Question 8

What is relative isotopic mass ?

Answer 8

Mass of a single isotope of an element relative to 1/12 the mass of an atom of carbon 12.

Question 9

How to calculate relative atomic mass ?

Answer 9

Sum of (relative abundance × mass no.) of each isotope ÷ sum of relative abundance.