In 1687, ___ explained that gravitational forces hold the solar system together.

A. Newton

B. Copernicus

C. Halley

D. Galileo

Are magnesium and calcium more reactive with oxygen in the air than aluminum?

How many electrons does barium have to give up to achieve a noble-gas electron configuration?

Using the combined gas law, calculate the following. Also, what other law could you have used to solve this problem? Some teenagers think that their parents are "full of hot air.

Give the formulas for the ionic compounds made of the following ions: Sc3 + and Br¯ K + and O2¯ Ca2 + and I¯ Cr3 + and S2¯ Rb + and F¯ magnesium (Mg) and oxygen (O) ions potassium (K) and nitrogen (N) ions strontium (Sr) and fluorine (F) ions

Which element in period 3 on the periodic table is a metalloid? magnesium (mg) aluminum (al) silicon (si) sulfur (s)

How many nitrogen molecules are in 1.2 moles of N2?

Which best describes how sediment forms?

Detailed explanation of why the sky is blue

Becky leaves home and write a distance of 30 KM it took her 2.5 hours what is her speed

Describe the weather associated with a high presurre system