How many electrons are in the outermost energy shell of a calcium atom?

Which are homogeneous mixtures? check all that apply

How do you know which halide salts confirms a presence of F - ions, Cl - ions, Br - ions, and I - ions?

A Student Mixed two clear liquids together in a beaker. A Gas and a new liquid were formed. The gas escaped, so the student was unable to measure the mass. She guessed that its mass was more than 10.0 grams.

A bromine atom in an excited state could have an electron configuration of (1) 2-8-18-6 (2) 2-8-18-7 (3) 2-8-17-7 (4) 2-8-17-8

How many molecules of dinitrogen pentoxide are in 0.27 moles of dinitrogen pentoxide?

Identify the following: 1. The only 2 liquid elements. 2. The element in period 4, group 0. 3. The second metalloid in period 4. 4. The first element in group 4A.

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation

How can a gardener remedy soil that is overly acidic?

True or false everything has the same amount of energy?