Which element would you expect to have the most similar properties

copper and zinc

nitrogen and oxygen

carbon and silicon

Electrons move about the nucleus of an atom in regions called what?

A published hypothesis: 1) is accepted by the scientific community 2) should be tested by the scientific community 3) does not need to be tested 4) becomes a scientific law

A chemical is the class of atoms which contain the same number of protons

How many oxygen atoms are in 1.00 g of quartz?

A glass with a few militers of water is left out on the cabinet what happens next

A child sits on a partially filled balloon and decreases the volume by half. What happens to the pressure inside of the balloon?

Which phrases describe all the outer planets' motion? Check all that apply. no rotation fast rotation slow revolution opposite revolution north to south rotation

Rank the species (amide ion, ammonia, or ammonium ion) from the largest to the smallest H-N-HH-N-H bond angle? Rank from largest to smallest H-N-HH-N-H bond angle. To rank items as equivalent, overlap them.

What is the ratio of effusion rates of krypton and neon at the same temperature and pressure?

Balance the following equation _NaOH (aq) + _HNO3 (aq) > _NaNO3 (aq) + _H2O (1)