An element's reactivity and other chemical properties are determined by the number of

What is the study of matter and it's changes.?

Compared to other stars we observe, the Sun appears bigger and brighter because: A It is visible at night It is much closer to Earth It has more mass

What types of evidence do geologists usually study?

An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the nucleus?

What is the correctly balanced chemical equation for the reaction of KOH and H2SO4

What type of reaction is 2 NO2 - --> 2 O2 + N2

The main source of phosphorous is in: rocks water plants the atmosphe

To what part of a plant does the stem sliver water and nutrients

You place a balloon in a closed chamber at STP. When the balloon doubles in size, what happens to the chamber pressure? A.) The pressure stays the same B.) The pressure doubles C.) The pressure reduced by one half

2K3N + 3CaCrO4 → Ca3N2 + 3K, CrO Give the formula for the second reactant: How many potassium atoms on the reactant side: How many oxygen atoms on the product side?