isotopes

Question 1

what are isotopes?

Answer 1

are atoms of the same element but different mass number. this is caused due to a different number of neutrons in the nucleus

Question 2

relative atomic mass

Answer 2

is an average value that takes account of the abundance of the isotopes of the element

Question 3

relative atomic mass calculations:

Answer 3

(mass number X abundance ) + (mass number X abundance )

                    100

Question 4

why is the chemical reactivity of isotopes similar?

Answer 4

because isotopes have the same number of protons and electrons. and the electrons that orbit in energy levels are in charge/determine of the atoms reactivity

Question 5

What is meant by ‘physical property’?

Answer 5

it means that the substance can be measured and observed

Question 6

why so simple molecules evaporate faster?

Answer 6

simple molecules evaporate faster due to the fact they allow forces between molecules