Which of the following elements is an alkali metal?

potassium (K)

calcium (Ca)

chromium (Cr)

germanium (Ge)

Let A be the last two digits of your 8-digit student ID. Example: for 20245347, A = 47 Radio waves, from your favorite radio station has a frequency of (A + 88.3) MHz (megahertz). What is the corresponding wavelength for this frequency in meters?

If 0.683 grams of silver chloride is produced how much (mass) silver nitrate would need to be reacted

KNO3 + H2CO3-> K2CO3 + HNO3

Based on Reference Table I, which change occurs when pellets of solid NaOH are added to water and stirred? (1) The water temperature increases as chemical energy is converted to heat energy.

Which compound has both ionic and covenant bonds

Why is it important for us to study outer space?

What is the correct noble gas configuration of chlorine

A flask of fixed volume contains 1.00 mole of gaseous carbon dioxide and 88.0 g of solid carbon dioxide. the original pressure and temperature in the flask is 1.00 atm and 300. k. all of the solid carbon dioxide sublimes.

Oxygen is in group 16 of the periodic table. An oxygen ion (O2-) has a charge of - 2. Which of the following would be most likely to combine with an oxygen ion to form a new compound?

How and why - Why does ice float on water