5. Which of the following statements is not true?

The nucleus of an atom has a positive charge.

Atoms of the same element can have different masses.

Atoms of isotopes of an element have different numbers of protons.

Atoms are mostly empty space.

The nucleus of an atom ok K-42 contains

What are two ways condensation differs from boiling?

What is one possible effect of a hurricane in florida? Avalanche drought storm surge wildfire

What would happen if less calcium chloride reacted and more unknown carbonate reacted?

A vapor is which state of matter Solid Liquid Gas All of the above

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?

7. Convert 5.2 cm of magnesium (Mg) ribbon to mm of Mg ribbon.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol