An electrically neutral atom has the following electron configuration 1s22s22p63s2. what is the name of this atom?

a. oxygen

b. magnesium

c. sodium

d. aluminum

How mant many electrons does iron have?

How many grams are in 1.6 moles of potassium bromide?

Consider the hydrate below. FeCl3•6H2O Which part of the formula comes first in the name of the compound? -the term hydrate -the anhydrous compound -the prefix for the coefficient of water -the physical state of the compound

A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer? (a) adding 0.050 mol of HCl (b) adding 0.050 mol of NaOH (c) adding 0.050 mol of NaF (d) none of the above

Electrons are embedded in a mass of positively charged matter.

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?