What term refers to the elements in a column of the periodic table

An atom with one valence electron combines with an atom with seven valence atoms. What is likely to happen to the atom with one valence atom?

When you crush a first-aid pack for an injured athlete and the pack gets cold, which of the following is true? a. A physical change has occurred, with energy being absorbed. b. A chemical change has occurred, with energy being given off. c.

How many shells of electrons would you expect to find in the fifth period?

Element Atomic Number Number of Protons Number of Electrons Number of Neutrons Mass Number Carbon 12 8 8 Hydrogen 1 10 Using the chart above, determine which statement would be FALSE. A) Carbon would have 6 protons. B) Hydrogen would have 0 neutrons.

Do all dipole-dipole forces have the same strength?

Distinguish between elements, compound and mixture

How are atomic number, atomic mass and the number of protons in an element's atom related?

Which term identifies a reaction that breaks apart macromolecules?

How can a molecule such as bcl3 act as an acid if it has no protons to donate?

If a sample of this compound contains 6.4*1022 sodium ions, how many sulfide ions does it contain?