Which two elements make up more than 90 of the dry weight of plants?

A plant converts light energy from the sun to chemical energy stored in glucose through fermentation. anaerobic respiration. photosynthesis. aerobic respiration.

Explain how elements are arranged on the periodic table. What does the table tell you when you read it like sentences in a book - left to right, and to bottom.

What is si atomic radius

How many C atoms are present in 1 mole of CO2

Fossil fuels are organic materials. True False

When a catalyst lowers the activation energy of a reaction the rate of the reaction?

Liquids: A) must be contained to stay in one spot B) have a variable volume, but a fixed mass C) are usually more dense than solids and gases D) cannot be changed into gases

Given the following list from the activity series of metals (from most active to least active) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur? 1. Co²⁺ (aq) + Al (s) → Al³⁺ (aq) + Co (s) 2.

Chemical reactions that release energy A. will not occur. B. need catalysts to occur. C. will always explode. D. often occur spontaneously.

Which metal exist in liquid state and can be cut with knife?