Atomic Size: Determine which of the following element pairs is the larger one 1. Carbon or Fluorine

2. Iodine or Fluorine

3. Krypton or Argon

4. Hydrogen or Potassium

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Is laundry detergent an acid or a base?