2.5 Atoms, Elements and the Periodic Table

Question 1

name the 20 elements in the periodic table in order

Answer 1

hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, argon,, potassium, calcium

Question 2

what is the symbol for helium?

Answer 2

He

Question 3

what is the symbol for sodium?

Answer 3

Na

Question 4

name one metal, and one non-metal from the periodic table

Answer 4

metals: lithium, beryllium, sodium, magnesium, potassium, calcium, aluminium

non-metals: boron, carbon, nitrogen, oxygen, fluorine, neon, silicon, phosphorus, sulfur, chlorine, argon

Question 5

name the element with the least mass

Answer 5

hydrogen

Question 6

what is an element?

Answer 6

a substance that is made with just one kind of atom

Question 7

what is the meaning of ‘atoms’

Answer 7

it means ‘cannot be divided’

Question 8

what is the symbol for aluminium?

Answer 8

Al

Question 9

what is a symbol

Answer 9

a useful shorthand/short way of referring to the elements

Question 10

what is the symbol of calcium?

Answer 10

Ca