Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement for nitrogen?

A. 2, 7

B. 2, 5

C. 2, 2, 3

D. 2, 8, 4

Which reaction takes place in a nuclear fission reactor? Superscript 13 subscript 6 upper C plus superscript 1 subscript 1 upper H right arrow superscript 14 subscript 7 upper N.

What is the average atomic mass of hafnium? A) 176 amu B) 177 amu C) 179 amu D) 180 amu

List a few ways that would lead you to believe a chemical reaction has occurred

You had to heat the NaHCO3 strongly in order for it to decompose. This is an example of an endothermic reaction.

A real gas behaves more like an ideal gas when the gas molecules are A. close and have strong attractive forces between them B. close and have weak attractive forces between them C. far apart and have strong attractive forces between them D.

35mL of acid with an unknown concentration is titrated to completion using 63mL of 3.0 MNaOH. What is the concentration of the acid?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as clf2-?

Look carefully at Kw expression. If the [H+] changed from [1 x 10-7] to [1 x 10-4], the [OH-] will: A. remain the same B. increase C. decrease

What on a bird, besides it's feet, is chemically similar to scales? A. beak B. feathers C. wings

What are the carbon (C) and oxygen (O) in carbon dioxide (CO2) ? (select all that apply) A) Atoms B) Compounds C) Elements D) Molecules