The electron configuration for an atom is 1s22s22p2. How many electrons does the atom have?

4

2

6

5

Which of the following is a molecule but NOT an element? A. O2 B. CO2 C. N2 D. H2

The bond enthalpy of the C-N bond in the amide group of proteins can be treated as an average of C-N (276 kJ/mol) and C═N (615 kJ/mol) bonds. Calculate the maximum wavelength of light needed to break the amide bond.

Calculate the number of milliliters of 0.568 m ba (oh) 2 required to precipitate all of the fe3 + ions in 165 ml of 0.663 m fe (no3) 3 solution as fe (oh) 3.

True or false Infrared rays are electromagnet waves that are longer than radio waves but shorter than visible light rays.

Explain why we did not see distinct lines (like on an emission spectrum) when the metal salts were burned.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda