CHEMISTRY MIDDLE SCHOOL

Potassium has an atomic number of 19.Which of a potassium atom's electrons are its valence electrons?
Select one:
a. Those in the third shell from the nucleus.
b. Those in the second shell from the nucleus.
c. Those in the outermost shell.
d. Those in the innermost shell.

Answers

Answer 1
Answer: The correct response would be C. Those in the outermost shell, and of highest electron energy are the valence electrons for potassium.

Related Questions

Give two examples of chemical energy being transformed into electrical energy
A plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal to the surroundings is categorized as a
How many grams of k2so4 would you need to prepare 1500 g of 5.0% k2so4 solution?
The model is made of an ionic compound of aluminum and chlorine. Aluminum has an oxidation number of 3 and chlorine has an oxidation number of -1. Based on the evidence, predict the chemical formula, chemical name and properties of the compound between aluminum and chlorine.
Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their(1) atomic numbers (2) crystal structures (3) isotopic abundances (4) percent compositions

Given the reaction below, which is the oxidized substance?Mg + Cl2—>Mg2+ + 2C1-
A)2014
B)Cl2
C)Mg
D)Mg2+

Answers

The metal loses electrons, and when it becomes Mg2+, it loses two electrons, becoming oxidized. So, the correct option is D.

What is Oxidation reaction?

Initially, the word "oxidation" was used to refer to chemical processes in which a component reacts with oxygen. An illustration of this is the oxidation of magnesium in the formation of magnesium oxide when magnesium and oxygen react.

Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electron are lost, irrespective of whether oxygen was present, after it was realised that the substance loses electrons when it is oxidised.

In the aforementioned example, the metal loses electrons; specifically, it loses two electrons as it changes from Mg+ to Mg2+, getting oxidized.

Therefore, the correct option is D

Learn more about Oxidation reaction, here:

brainly.com/question/19528268

#SPJ7

Answer:

Mg ²⁺

Explanation:

Τhe metal loses electrons and in forming Mg²⁺ ,it loses 2 electrons and hence oxidized.

Mg(s) ⇒ Mg²⁺ + 2e⁻

What planet has the largest dust storms?

Answers

Mars has the largest dust storms.

What are the problems with studying the structure of the earth?

Answers

well we are not able to see the internal structure of the Earth directly because we can't get at it! The thinnest crust is under the oceans but even that is around 7kms thick, way deeper than we can drill. We have to use indirect methods like earthquakes, and infer the structure from the way the pressure and shear waves produced travel through the Earth. 

What is the answer to 4x - 16

Answers

it simply equals 4x-16.......
the expression is in lowest terms, so you can’t do anything else

Answer:-64

Explanation:

I need help on the questions above

Answers

i think its a molecule 

A negative ion has moreA. protons than electrons
B. electrons than protons
C. neutrons than protons

Answers

a negative ion has more electrons than protons (b)
Other Questions
The jelly-like substance that fills the cell is called
Please help I need the answer now. Write a balanced equation for combustion of pentane in plenty supply of air and in limited supply of air
What is the ratio of atoms in carbon dioxide , or CO2
What are the two gases that escaped Earth's atmosphere during early formation? A. Helium and nitrogenB. Helium and oxygenC. Hydrogen and heliumD. Hydrogen and nitrogen