Which word (s) below is represented by the word "period" on the periodic table?

a. group

b. family

c. energy level

d. valence electrons

Stars are an example of what type of matter? gas solid liquid plasma

If we add sodium bicarbonate to a sample of vinegar, what type of evidence produces?

Why is it important to know a tornados velocity and not just its speed

Sodium borohydride, NaBH4, and boron trifluoride, BF3, are compounds of boron. What are the shapes around boron in the borohydride ion and in boron trifluoride?

When compounds form, what is one result for the atoms that bonded?. A. a stable arrangement of electrons. B. an unstable arrangement of electrons. C. more than eight electrons in their valence shell. D.

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?

I have 2 electrons is the first shell, 8 in the second, and 6 in the third

The production of plastics makes life, so it benefits society. On the other hand, the production of plastics causes air and water, so it also harms society.

The total number of moles represented by 20 grams of CaCO3 is

Particles of matter how have both potential and kinetic energy is that true or false?