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10 Cards in this Set
- Front
- Back
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1. Everything in the universe is composed of this.
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2. Matter is anything that has?
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3. The pull of gravity on an object is ?
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4. Pure substances that cannot be broken down into simpler substances are called?
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5. How many elements occur naturally?
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6. What are the 4 elements that make up 90% of the mass of a substance?
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7. What is the simplest particle of an element?
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8. What is found in the core of an atom?
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9. What are the 2 particles in the nucleus and give the charge of each.
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10. The number of protons is called the atomic _____?
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11. An isotope has different numbers of _____________.
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12. You find this by adding the number of protons and neutrons in an atom.
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13. What is the charge of an electron?
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14.Outer electrons have ________ energy than inner electrons.
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15. A pure substance made up of atoms of two or more elements is called a__________?
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16. The simplest part of a substance that retains all the properties of the substance is called?
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17. What is broken in a chemical reaction?
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18. A bond that forms when 2 or more atoms share electrons.
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19. A bond that forms when electrons are transfered (lost or gained) by atoms.
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20. Atoms that lose electrons are called?
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