Neutral because the charge on the electrons is the same as the charge on the protons just opposite so they cancel each other out.
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What is the overall charge on the nucleus?
Positive because of the protons.
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What is an element?
An element is a substance made up of atoms that all have the same number of protons in the nucleus.
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Roughly how many elements are there?
100
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What is the symbol for the element iron?
Fe
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What is an isotope?
Isotopes are different forms of the sme element, which have the same number of protons but a different number of neutrons.
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When using isotopes what do we calculate instead of the mass number?
The relative atomic mass.
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What is the formula for relative atomic mass?
sum of (isotope abudance x isotope mass number) ÷ sum of abundances of all the isotopes.
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What is a compound?
Compounds are substances formed when two or more elements, the atoms of each are in fixed proportions throughout the compound and they're held together by chemical bonds.
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What is a covalent bonding?
A compound formed from non-metals consists of molecules. Where each atom shares an electron with another atom
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What is ionic bonding?
A compound which is formed of a metal and a non-metal consists of ions. Metal atoms lose electrons to form positive ions and non-metals gain electrons to form negative ions.
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Give an example of a ionic bond?
Sodium Chloride.
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Give an example of a covalent bond?
Water.
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How can compounds be represented?
As formulas.
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Whats on the left side of your word equation?
Reactants
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Whats on the left side of your word equation?
Products
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What does the number in front of the formula in a symbol equation apply to?
The entire formula
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What do the smaller numbers within or at the end of the word equation apply to?
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