Name an element or elements in the periodic table that you would expect to be chemically similar to potassium.

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?