The chemical symbol for a calcium ion is ca2. what does the 2 symbolize

Atomic number and mass of H

How is the chemical symbol of an element determined

Rank the following atoms in order of increasing electronegativity. Li, Na, H

5) What is the difference between CO2 and XeCl2? The difference between SCl2, SCl4, and SCl6?

What coefficients are needed to balance the equation for the complete combustion of methane? enter the coefficients in the order ch4, o2, co2, and h2o, respectively.

Compared to the charge of a proton, the charge of all electron has (1) a greater magnitude and the same sign (2) a greater magnitude and the opposite sign (3) the same magnitude and the same sign (4) the same magnitude and the opposite sign

What's the definition of fossil

Calculate the molar concentration of oh - ions in a 0.555 m solution of hypobromite ion (bro-; kb=4.0*10-6).

The Specific heat of beryllium is

The first three electrons that enter into p orbitals must have a. parallel spins. b. opposite spins. c. low energy levels. d. opposite charges.