An atom of potassium-37 and an atom of potassium-42 differ in their total number of

(1) electrons (3) protons

(2) neutrons (4) positrons

An atom is determined to contain 17 protons, 18 electrons, and 18 neutrons. What are the mass number and charge of this atom or ion?

1. What is the term for a state of matter that has a definite volume and a definite shape?

A combination reaction occurs when two or more reactants form one product. a. true

From the data, they concluded that bubble wrap was the best insulating material. What is the weakness in the conclusion? A) It is the better of two insulators only; it is not the best insulator.

On a graph of mass vs. volume, which of the following indicates the density of the substance? Missing Metadata Question 11 options: x-axis y-axis slope origin

Why do you need a balanced equation for stoichiometry?

The density of gold is 19.3 g/cm3. What is the volume of a 13 g gold nugget?

Glucose, C6H12O6, C6H12O6, is used as an energy source by the human body. The overall reaction in the body is described by the equation C6H12O6 (aq) 6O2 (g) ⟶6CO2 (g) 6H2O (l) C6H12O6 (aq) 6O2 (g) ⟶6CO2 (g) 6H2O (l) Calculate the number of grams of

Which two bases pair with each other?

What is the main cause of increased erosion