Is my answer right?

Which of the following is a reasonable ground-state electron configuration?

1s22s22p43s2

1s21p62s22p6

1s22s22p63s23p64s24d10

1s22s22p63s23p64s23d5< - - - my answer, is this right?

Jason ran 5/7 of the distance around the school track sara ran 4/5 of Jason distance what fraction of the total distance around the track did sara run

How many valance electron dose an atom of oxgen have? A 6 B 4 C 2 D 8

The density of phosphorus vapor at 310 degrees celcius and 775 mmHg is 2.64g/L. what is the molecular formula of the phosphorus under these conditions?

Which of the following is most likely to use coal as fuel? Stove Airplane Factory

Name the following Compounds Alkane C-C

What is the differnce between a stimlus and a response

A stack of books are sitting on the table. Which force is pulling it down? A. Buoyant force B. Pressure force C. Gravitational force

Can some one explain what solubility means? I really do not get it and we have a sub for the next week

The atomic number of an atom identifies the number of protons in its nucleus. If the overall charge on the atom is neutral, what must the atomic number also identify? A. the most common isotope's mass B.

A solution containing 2.8 moles of magnesium bromide is combined with a solution containing excess potassium carbonate. This chemical reaction takes place: MgBr2 (aq) + K2CO3 (aq) → MgCO3 (s) + 2KBr (aq). If the volume of the resulting solution is 1.