Which of the following is NOT a chemical change?
Which subatomic particle is involved in chemical bonding?
What is the smallest unit of an element that retains its chemical properties?
Which of the following is an example of a homogeneous mixture?
What is the atomic number of an element based on?
What is the SI unit of temperature?
Which of the following is a noble gas?
What is the chemical symbol for sodium?
What type of bond is formed when atoms share electrons?
What happens to the number of protons in an atom of an element as you move from left to right across the periodic table?