Question

HELP

2) How many of the following electron configurations for the species in their ground state are correct?

I. Ca: 1s²2s²2p⁶3s²3p⁶4s²
II. Mg: 1s²2s²2p⁶3s¹
III. V: [Ar] 3s²3d³
IV. As: [Ar] 4s²3d¹⁰4p³
V. P: 1s²2s²2p⁶3p⁵

Select one:

a. 1

b. 2

c. 4

d. 5

3) How many of the following are pure substances? (Check all that apply.)

Select one or more:

a. gold

b. ammonia

c. water

d. carbon

f. brass

4) 1s²2s²2p⁶3s²3p⁶ is the electron configuration for which one of the following ions?

Select one:

a. S^2-

b. F^-

c. Na⁺

d. Ca⁺

5) How many protons, electrons, and neutrons, respectively, does ⁸⁹Sr²⁺ have?

Select one:

a. 36, 38, 51

b. 36, 38, 53

c. 38, 36, 89

d. 38, 36, 51

6) Which of the following has the smallest radius?

Select one:

a. S^2-

b. Ca²⁺

c. K⁺

d. Ar

7) How many protons are in the atom $ppg__cognero__Chapter_04_Chemical_Founda$?

Select one:

a. 5

b. 6

c. none of these

d. 18

8) What is the molar mass of SbCl₃ which is formed when Sb reacts with Cl₂ according to the unbalanced equation   $ppg__cognero__Chapter_09_Chemical_Quanti$

Select one:

a. 7.56 g/mol

b. 102 g/mol

c. Cannot be determined based on the information given.

d. 228.11 g/mol