Which of the following is NOT a characteristic property of matter?
What is the smallest particle of an element that retains its chemical properties?
Which subatomic particle has a positive charge?
How many elements are currently known to exist?
What is the chemical symbol for iron?
Which of the following is a noble gas?
What is the chemical formula for water?
Which state of matter has a definite volume but no definite shape?
What type of bond is formed between sodium (Na) and chlorine (Cl) to form sodium chloride (NaCl)?
Which gas is essential for respiration?