How do quasars differ from galaxies

What change occur when a substance changes form, shape or phase but it's identity remains the same

Select the correct answer. Which element is more reactive than rubidium (Rb) ? A. aluminum (Al) B. cesium (Cs) C. strontium (Sr) D. beryllium (Be)

True or False The nucleus of an atom does not change when the atom undergoes a chemical reaction. True or False An atom does not react with other atoms if it has the same number of protons as it has electrons.

Hardness and density are physical properties. true false

What is a molar mass?

The gravitational force of Earth is causing volcanoes on the moon. True or false?

Glucose dissolves in water but doesn't produce ions during dissolution process. Two (positive and negative) electrodes that were hooked up to a light bulb and external source of power were placed in an aqueous solution of glucose.

What is the structural difference between atp and datp?

What was henri becquerel studying when he accidentally discovered radioactivity?

A substance which is made up of identical atoms is a (n): chemical element compound alloy