I NEED UR HELP WITH THIS ILL MARK U AS BRAINLIST/5 star and a like. Just answer the ones u know I’ll still mark u as brainlist and also put numbers on the side so I know which is which, let’s see who can answer em with full sentences. 1. A potassium atom contains 19 protons:
A) how many electrons are present in a potassium atom? Justify your answer.
b) What is the electronic configuration of a potassium according to the Bohr model?
C) how many electrons are in the valence shell of a potassium atom?
D) what could be done to potassium atoms to make electrons jump into the fifth shell?

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Free answer. the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)