Which statement is true about elements?

Select one:

a. They are finite in number.

b. They are infinite in number.

c. They combine to form atoms.

d. They combine to form electrons.

Describe the flow of current through an electric heater when the heater is switched on

What are Example of alkalis?

What is activation energy for the forward reaction represented in the energy diagram? answers 200 kJ +350 kJ +150 kJ +250 kJ

Hydrazine is a weak base, kb=3.0x10^-6. find the ph of an aqueous 2.0 m solution of its conjugate acid

If a truck goes 30 km In 30 minutes what is the average speed

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.