When a candle is cooling down is it a physical or chemical change

Identify the charge on the nucleus and on the electrons of an atom. How do i do this?

Suppose you were to use a 0.100 M potassium hydroxide as the base instead of 0.100 M sodium hydroxide. How would this affect the results of the experiment?

Determine the number of bonding electrons and the number of nonbonding electrons in the structure of xe f 2.

An atom has 26 protons and 24 electrons, which element is this?

Which of the following would cause the greatest decrease in gravitational force between the earth and the moon?

Find the molar mass of potassium dichromate, K2Cr2O7

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.

Write the outer electron configuration for the group 15 element in the fourth period.

Describe the relationship between transmittance and the absorbance?