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The human body is primarily composed of which element?   Group of answer choices A. Hydrogen B. Carbon C. Oxygen D. Phosphorous

"Gatorade contains sodium and potassium electrolytes that can help to replenish ions that are lost as a result of dehydration. a. b.c. d. e. f. g. h. I. j. k."

This is not graded, it’s for practice only. Do all of the questions.

11. State whether the following elements are metals, nonmetals, or metalloids. a. Potassium b. Phosphorus C. Silicon d. lodine 12. Identify the principal type of energy (kinetic or potential) that is exhibited by each of the following. a. A piece of coal b. A falling rock ||| c. A compressed metal spring d. A rolling soccer ball on a level field

A diagram of the periodic table of the elements is shown below. Periodic Table of the Elements 3 In which region of the table would nonmetals be found? A. 1 B. 2 C. 3 D.

Magnesium reacts explosively with oxygen to form magnesium oxide. Which is NOT true of this reaction?A. The mass of magnesium oxide produced equals the mass of magnesium consumed plus the mass of oxygen consumed.B. The reaction describes the formation of a new substance.C. The product of the reaction, magnesium oxide, is a chemical compound.D. Magnesium oxide has physical and chemical properties similar to both oxygen and magnesium.

The element bromine forms a(n) _______cationanion with the charge . The symbol for this ion is , and the name is. The number of electrons in this ion is . The element fluorine forms a(n) _______cationanion with the charge . The symbol for this ion is , and the name is. The number of electrons in this ion is .

2. Structure E is a form of carbon. What is the name of this structure? A. carbide B. graphite Put a ring around the correct answer. C. lead D. poly(hexene) 3. Name another form of carbon.. 4. Write the simplest formula for substance B. 5. Is substance D an element or a compound? Explain your answer.

Please help me with questions 1 and 2 1. What is an example of matter? A. Light B. None of the answers are correct C. Heat D. Energy E. Oxygen gas 2.An ionic bond is a bond in which A. Atoms are repelled by each other B. Atoms of opposite charges attract each other C. Atoms share neutrons D. Atoms share protons E. Atoms share electrons

3. What substance was used to separate the salt from the sand? Group of answer choices A. Oil B. Heat C. Cooling D. Water