If a neutral atom of oxygen has 8 protons, 8 electrons, and 7 neutrons, what number is the mass number of this atom?

A. 8

B. 15

C. 16

D. 23

What type of matter is composed of two or more elements that are chemically combined in a fixed position?

Carbon can form many different types of covalent compounds with a variety of other elements. True False

Which value gives the number of particles in 1 mol of a substance?

Write the word and formula equations representing the chemical reaction that occurred between the. barium chloride solution, BaCl2 (aq), and the sodium sulfate solution Na2SO4 (aq).

Two up quarks and one down quark make up which of the following particles? A) proton B) neutron C) lepton D) electron

What are some facts about the element Rutherfordium

Luis set a glass of ice water out side is the sunshine. when he looked at the glass 10 minutes later, the contents had changed. what kind of change happened to the ice water? A. evaperation B. conduction C. chemical change d. sudden change

A substance is considered to have a smaller surface area when ... A. it is a fine powder B. it is in large chunks C. you have a small amount of the substance D. you have a large amount of E. the substance

Which is the noble gas notation for chlorine? A-[Ne] 4s2 4p5 B-[Ne] 3s2 3p5 C-[Ne] 3s2 3p3 D-[Ne] 3p2 3p5

Is argon long hand or noble gas