How many sublevels of an atom are there? And how does it relate to the periodic table

Choose an element from the Group that will lose 2 electrons in order to achieve noble gas configuration? What is the group name for that element?

Methane is a compound which is 75% carbon, by mass, the balance being hydrogen. If a sample of methane weighs 24 g, what mass of hydrogen does it contain?

Why is a solid recrystallized with the minimum of hot solvent?

Calculate [h+] for a solution in which [oh-] is 100 times greater than [h+].

Concentrated HCl is 98% and has density 1.46g/cm 3 what volume of concentrated acid required to make 2L of 0.25M HCl.

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false