Validate how valence electrons determine the chemical reactivity of an element: give 2 examples of elements with high reactivity and justify your response.

Describe the composition of the nucleus of an atom. A) It is composed of protons. B) It is composed of protons and neutrons. C) It is composed of protons and electrons. D) It is composed of protons, neutrons, and electrons.

Why does a pendulum need chemical energy

How many atoms of Mg are present in 97.22 grams of Mg? 6.022 * 1023 2.408 * 1024 4.818 * 1024 5.855 * 1025

What is the best way to determine if an aqueous solution of sodium nitrate is unsaturated

What is the change in temperature in a 128g sample of water if it absorbs 2808J of heat energy at a temperature of 2°C?

Is the compound CO ionic or covalent

What is the volume in ml of one pound of mercury?

How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water? A. There are four times as many molecules in one mole of carbon dioxide as there are in one mole of water. B.

Suppose you had 1.0 mol samples the following gases at STP. If the volume of each of the samples of gas was reduced to one tenth of its original size and the temperature remained the same, which gas would have the lowest pressure?

What happens when the silvered coin is put on the flame