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What is an atom?
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The smallest component of an element having the chemical properties of the element.
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Why H2O is represented as the formula of water?
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It's represent as the formula of water because mean that in water there is 2 hydrogen gases and 1 oxygen gas.
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Compare Electron, Protons and Neutron.
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1. Electron is a particle that has a negative charge.
2. Proton is a particle that has a positive charge. 3. A Neutron is a particle that has not electrical charge. |
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What is a molecule?
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A molecule is the smallest particle of a substance made of combined atoms that has the properties of the substance.
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What is a compound?
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A compound is a type of matter made of a combination of elements.
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Tell two element's symbol of each type that we can find in the Periodic Table.
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G. Helium : He
G. Hydrogen: H L. Mercury: Hg L. Bromine: Br S. Carbon: C S. Calcium: Ca N. Technetium: Tc N. Californium: Cf |
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What are Salts?
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Salts are compound in which particles are held together by opposite charges. These particles may be charged atoms or group of atoms.
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Answer the next statements if they are True or False:
1. Atoms can determine the properties of an element. 2. All carbon atoms have six protons. 3. All helium atoms have exactly 6 protons. |
1. TRUE / 2. TRUE / 3. FALSE (All helium atoms have exactly 2 protons and usually have 2 neutrons and 2 electrons.) /
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