What do elements in the first two columns of the periodic table have in common? (2 points)
a. they have two valence electrons.
b. they tend to lose electrons to gain stability.
c. they react strongly with the alkali metals.
d. they do not react with halogens.

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced