Which of the following would not have the same number of valence electrons as the others?

oxygen

carbon

sulfur

selenium

Which number gives the atomic mass of the element?

Define and then describe the difference between a polar covalent bond, nonpolar covalent bond and ionic bond.

cells that perform a specific function in an organism A. are all the same B. can survive on their own C. are specialized D. perform all of the functions

The Plum Pudding model of the atom states that 1. Each atom has an overall negative charge 2. Each atom has a dense, positively charged Center 3. an atom is a solid, indivisible sphere that makes up all matter 4.

Why does the s-block portion of the periodic table span two groups?

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?

What is the oxidation number for CO2