The given statements are true or false? A. The element with a ground state electron configuration of 1s22s22p63s2 is an alkaline earth metal.
B. If an element (abbreviated X) has a ground state electron configuration of [Ne]3s23p4, then the formula of the compound that X forms with magnesium is Mg2X.
C. The element with a ground state electron configuration of [Kr]5s24d105p5 has 15 valence electrons.
D. The ground state electron configuration for the undiscovered element 117 is [Rn]8s26f147d108p5.
E. The ground state electron configuration for Cr is [Ar]4s23d4.
F. The electron configuration of 1s22s22p63s23p64s13d2 is an excited state electron configuration for Ti.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o