Who was the first person to propose that atoms existed?

A group or family represents the * blank * on the periodic table a. vertical column b. series c. block d. horizontal row

Which of the following is a nonrenewable energy source? a:solar b:wind c:natural gas d:geothemail

In the mechanism of nucleophilic substitution (SN1 or Sn2), an existing bond breaks and a new bond forms.

How many moles of solute are present in 50.0mL of 0.20m KNO3?

What is true if ln K is negative? A) ΔG°rxn is positive and the reaction is spontaneous in the forward direction. B) ΔG°rxn is negative and the reaction is spontaneous in the forward direction.

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?