What is the electron structure of a beryllium ion with a net ionic charge of + 2?

1s1

1s2

2s1

2s2

Based off of the plum pudding model, what should've happened in the gold foil experimet

Which element could likely substitute for Si in a solid solution

2. What is the difference between a formula unit for an ionic compound and a molecular formula for a molecule?

Why is it important to repeat the steps or an experiment multiple time

A student claims that during a crescent moon phase, the sun's light is only shining on the moon a tiny bit and during a full moon, the sun's light is shining on the entire moon. Do you agree or disagree with this claim? Explain.

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?

What are the two main classifications of energy resources?

A liquid is heated and a solid forms at the bottom of the beaker. Is this a physical or chemical change?

How to predict the formula of an ionic compound based on the charges of the ions?

Which of the following kingdoms in one-celled organisms