In a periodic table, a set of properties repeats from:

A) Element to Element

B) Group to group

C) Column to column

D) Row to row

N2 ( g. 3h2 ( g. 2nh3 ( g., what will happen if more nitrogen gas is added?

Describe the relationship between volume and temperature. Use specific information from your data and/or graph to illustrate this relationship

What does a strong nuclear force do in an atom? It repels electrons from other electrons. It repels protons from other protons. It attracts protons and neutrons. It attracts protons and electrons.

A compound is analyzed and found to contain 22.10%Al, 25.40%P, and 52.50%O. What is the empirical formula of the compound? A) Al (PO4) 3 B) Al4PO3 C) AlPO D) AlPO4

One difference between mixtures and pure substances is that A) mixtures can be physically separated. B) mixtures are made of one type of atom. C) pure substances have no chemical bonds. D) pure substances can be physically separated.

A student has a solution with a pH of 7. The student adds HF, hydrogen floride, to the solution, hoping to increases the pH of the solution. What is wrong with this student's approach? Select one: A. You cannot change the pH of a solution. B.

What is more likely to happen if wetlands are drained?

A) If you weigh a hydrated compound before and after heating it. Do you expect the mass to be more or less than before heating? Explain why. b) How about if you weigh a bag of popcorn before and after heating it.

Define the term relative molecular mass

It took many of the metals several minutes to begin to react. Once the reaction was initiated, several of these metals continued to react quite vigorously.