The ground state electron configuration for sodium is:

a. 1s2 2s2 2p8.

b. 1s2 2s2 2p6 3s2 3p6 4s1.

c. 1s2 2s2 2p6 3s2 3p4.

d. 1s2 2s2 2p6 3s1.

The effective nuclear charge for an atom is less than the actual nuclear charge due to A) shielding. B) penetration. C) paramagnetism. D) electron-pair repulsion. E) relativity

There are questions in the math section of the Aspire test.

The most common isotope of chromium has a mass number of 52. Which notation represents a different isotope of chromium? a. 52/25Cr b. 54/24Cr c. 24/32Cr d. 24/54Cr

The flattest place on Earth is A the Abyssal Plain B the Sahara Desert C in Oklahoma on the Great Plains D the continental shelf

A certain water tower hold 4.6*10^5 gallons of water. find the volume of that water in liters.

chromium can combine with chlorine to from corneum chloride which equation is a correct representation of this reaction

What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass = 64.23 amu (26.0%), and one with mass = 65.32 amu? (a) 65.3 amu (b) 64.4 amu (c) 64.9 amu (d) 65.0 amu (e) 64.8 amu

Is this base a physical or chemical property?

Classify each of the following aqueous solutions as a nonelectrolyte, weak electrolyte, or strong electrolyte. a) LiClO4 b) HClO c) CH3CH2CH2OH d) HClO3 e) CuSO4 f) C12H22O11

Give examples of temporaty physical change