Select the correct answer.

Which types of orbitals are found in the principal energy level n = 2?

A s

B. s, f

C. s, d

D. S, p

E. s, p, d

What is the machanism of bromination of benzene

As the mass of the nucleus increases, what happens to the ratio of neutrons to protons in stable isotopes? A. The neutron:proton ratio decreases. B. The neutron:proton ratio increases. C. The neutron:proton ratio remains 1:1. D.

Flames are the heat and light energy that is release when the chemical bonds in a substance are broken. What provides the chemical potential energy in a candle? A. spark B. heat C. wax D. water

When a writer uses "common knowledge" in an essay, why does it NOT require a citation nor is it considered plagiarism?

Why can't subscripts be changed in chemical formulas

If a farmer wants to increase the health of his crops, he could apply a nitrogen-based fertilizer. why is nitrogen important to plants?

A car battery produces electrical energy with the following chemical reaction. Pb + PbO2 + 2H2SO4; 2PbSO4 + 2H2O What is the mole ratio of PbO2 to water?

Which of the following is an example of the electrostatic force acting in a atom a. a neutron attracting a electron b. a neutron attracting a proton c. an electron attracting another electron d. a proton attracting an electron

When does water move between the surface of earth and the atmosphere

Why does water vapor exist naturally in the atmosphere