#1
Which chemical element is the primary component of natural gas?
#2
What is the chemical formula for table salt?
#3
Which gas is commonly known as laughing gas?
#4
What is the chemical symbol for gold?
#5
Which of the following is a noble gas?
#6
Which of the following compounds is responsible for the greenhouse effect?
#7
What is the process called when a solid changes directly into a gas without becoming a liquid first?
#8
Which chemical element has the highest melting point?
#9
What is the chemical formula for water?
#10
Which chemical compound is commonly known as baking soda?
#11
Which scientist discovered the radioactive element radium?
#12
Which gas makes up the majority of Earth's atmosphere?
#13
Which element has the highest atomic number?
#14
Which of the following is a transition metal?
#15