In which direction on the periodic table, horizontal or vertical, are elements with similar chemical properties aligned? what are families of elements with similar chemical properties called?

Predict the ideal bond angles around each central atom in this molecule. The formuala is N C N H 2. The central C atom is bonded to one N atom by a triple bond and a second N atom by a single bond.

A multivitamin tablet contains 40 milligrams of potassium. how many moles of potassium does each tablet contain?

Why Sncl2 is solid but SnCl4 is liquid at room temperature

Which bond requires the most energy to be broken? single covalent bond double covalent bond triple covalent bond The bond can't be broken.

Which of the following pairs of elements could possibly be in the same group on the periodic table? A forms a 1 + ion; B forms a 1 - ion. A has an atomic number 15; B forms a 3 - ion. A tends to form a 2 + ion; B tends to gain two electrons.

1. Which metal is the most reactive? How do you know this?

In addition to burning fossil fuels, humans return co2 to the atmosphere faster than it can be removed by:

A dilute solution contains large amounts of solute. True False

Consider the compound Sn (SO4) 2 and answer the following questions: a. What is the name of this compound? b. What is the molar mass of this compound? Explain how you calculated this value.

If you put a base in water, what will happen? A. it will dissociate B. it will form a covalent bond. C. it will bond with the water molecules