How many electrons can exist in the second shell surrounding an atomic nucleus?

a. 1 or 2

b. 1 to 8

c. more than 8

d. it depends on what the element is.

The structure of DNA resembles a twisted ladder. Determine the structural components that form the rungs of the ladder.

Sulfur dioxide is a (n) compound element heterogeneous mixture solution

sodium sulfate has the formula NA2SO4. a) what is the mass percentage of each element in sodium sulfate? b) how many grams of this compound contain 2.00grams sulfur

What is the balanced chemical equation for caffeine?

There are three gases in a sealed container. The partial pressure of gas A is 35 torr and the pressure of gas B is 3 torr. The total pressure in the container is 45 torr. What is the partial pressure of gas C?

The word atom comes from a Greek word that means

What is the rate of acceleration of 2000 kilogram truck if a force of 4200 n is used to make it start moving forward

For the chemical reaction H2 + CO2 → H2O + CO, the energy contained in the reactants is 394 kJ, and the energy contained in the products is 352 kJ, assuming 1 mol of each substance is present. Which of the following statements is true? A.

Why is particle size important in a heterogeneous catalyst

In a scientific experiment, the one variable that is purposely changed to test a hypothesis is called the manipulated variable. true or false