How is a pure substance different than a mixture

1: An ion of magnesium has 12 protons and a charge of + 2. How many electrons are in this ion? A. 2 B. 10 C. 12 D. 14

Write a hypothesis about whether radiation has the same impacts on coastal areas, forest areas, and desert areas.

This equation indicates that the reaction absorbs heat. What is this type of reaction called? H2O + heat → H2 + O2 A. an exothermic reaction B. a combustion reaction C. an endothermic reaction D. a heat-releasing reaction

What are sources of water pollution

Why are food preservatives added to food? A. to increase the rate of reaction B. to decrease the rate of reaction C. to decrease potential energy of the reactants D. to increase the temperature of the reaction

An easy way to assign the number of d-electrons (the “d count”) in a transition metal ion is to first look at the periodic table and take note of which group the element is in.

A basketball weigh more after it was inflated with air then when it was deflated how does this show that gas is matter

When was Magnesium discovered and how or who discovered it

Consider these statements regarding the body's inability to convert fat to carbohydrates. Select each statement that is true. 1. Acetoacetate is a normal, major energy source for the brain, heart muscle, and renal cortex. 2.

Which is the best term to use describing the energy of position