Elements Flashcards
(5 cards)
1
Q
Describe the meaning of an element.
A
An element is a chemical consisting of only atoms with the same atomic number.
2
Q
How are atoms commonly represented?
A
Using symbols such as Mg, Pb, Fe which are seen on the periodic table.
3
Q
What are isotopes?
A
They are different forms of the same element but have different amounts of neutrons and therefore a different mass number.
4
Q
Why is Relative Atomic Mass used instead of mass number?
A
An element can exist in many different isotopes of different mass numbers, so RAM is used to describe the element in general or as a whole.
5
Q
What is the formula used to work out Relative Atomic Mass?
A
= sum of (isotope abundance x isotope mass number)
/sum of abundances of all the isotopes.
