Which element is a metalloid?

a. argon (ar)

b. silicon (si)

c. potassium (k)

d. magnesium (mg)

What is the relative mass of an electron? A. 1/1840 the mass of an electron B. 1/1840 the mass of a neuron + proton C. 1840 the mass of a C-12 atom D. 1/1840 the mass of an alpha particle The answer is A.

A neutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within the atom?

The transfer of surface water into the ground to become groundwater is known as and it can replenish an aquifer.

A solution with a higher osmotic pressure than body fluids is said to be

Which response accurately describes a balanced force? Question 7 options: A 25-N force acts on the left side of the marble at the same time as a 25-N force acts on the right side of the marble.

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.

A chemist must prepare of aqueous potassium permanganate working solution. He'll do this by pouring out some aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water.

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment