#1
Which element has the chemical symbol 'Na'?
2 answered
#2
What is the atomic number of oxygen?
1 answered
#3
What is the chemical symbol for gold?
1 answered
#4
What is the atomic number of carbon?
1 answered
#5
What is the chemical symbol for potassium?
1 answered
#6
What is the atomic number of iron?
1 answered
#7
Which group of elements are known as the 'noble gases'?
1 answered
#8
What is the most abundant element in the Earth's crust?
1 answered
#9
Which element has the lowest melting point?
1 answered
#10
Who is credited with the discovery of the periodic law?
1 answered
#11
Which element is commonly used in batteries?
1 answered
#12
Which element is a halogen?
1 answered
#13
Which element has the highest atomic mass?
1 answered
#14
Which element has the highest electronegativity?
1 answered
#15
Which element has the highest boiling point?
#16