If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

How many electrons are shown in iodine electron dot structure?

Explain why atoms move at different speeds depending on whether they are liquids or solids.

An ionic bond can be formed when one or more electrons are: A) Equally shared between two atoms B) unequally shared by two atoms C) transferred from the nucleus of one atom to the nucleus of another atom D) transferred from the valence shell of one

Iron (II) sulfide reacts with hydrochloric acid according to the reaction: FeS (s) + 2 HCl (aq) → FeCl2 (s) + H2S (g) A reaction mixture initially contains 0.223 mol FeS and 0.652 mol HCl.

How many moles of pcl5 can be produced from 60.0 g of cl2 (and excess p4) ?

What type of mixture is 100 ml of water with a little bit of salt?

Which statement explains why meiosis haploid cells rather than diploid cells

Which factors can affect the amount of coco mix that can be dissolved in water? Check all that apply

If 25% of a radioactive element remains after 1,000 years, what is the half-life?

How many valence electrons do the alkaline-earth elements have? a. 1 b. 2 c. 7 d. 8