#1
Which of the following is a noble gas?
#2
Which element is known for its high reactivity and is found in Group 1 of the periodic table?
#3
What is the atomic number of carbon?
#4
Which of the following elements is a halogen?
#5
Which element is a noble gas and is commonly used in balloons for lifting?
#6
What is the chemical symbol for gold?
#7
How many electrons does a neutral oxygen atom have?
#8
What type of bond is formed between two nonmetals by sharing electrons?
#9
Which element is the most abundant in the Earth's crust?
#10
In a chemical equation, what does the arrow represent?
#11
What is the name of the process where a substance changes from a gas to a liquid?
#12