The elements in Group 2 have similar chemical properties because each atom of these elements has the same

(a) atomic number

(b) mass number

(c) number of electron shells

(d) number of valence electrons

A chemical reaction has not occurred if the products have

How many atoms in a mole of any substance?

Covalent bond results when fluorine bonds with: fluorine, hydrogen, iodine, potassium

How many cells in a unicellular organism function to get rid of waste?

Convert 1.53x10^23 atoms of nitrogen gas to moles.

How can the solubility of a solution be increased? By increasing the temperature. By decreasing the temperature. By increasing the amount of solvent added. By decreasing the amount of solvent added.

Read the scenario. Ammonia is obtained from a reaction between nitrogen and hydrogen gases. The mole ratio between hydrogen gas and nitrogen gas is 3 to 1, and the mole ratio between ammonia and hydrogen gases is 2 to 3.

Transmutation is the process of transforming one element into another through nuclear reactions. What will be the nuclide produced when Cf-249 is bombarded with C-12? Four neutrons are also produced by the reaction.

State the formula for density in words and mathematical symbols.

How many fe (ii) ions are there in 15.0 g of feso4?