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30 Cards in this Set
- Front
- Back
What do these signs mean? |
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What side of the periodic table are the non-metals? |
The right side |
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What is the charge and mass of: Protons Neutrons Electrons |
Protons- +1 and 1 Neutrons 0 and 1 Electrons -1 and negligible |
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What does the atomic number tell you? |
The number of protons and electrons (both are the same) |
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What does the atomic mass tell you? |
The number of protons and neutrons added together |
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What is an isotope? |
Atoms of an element that have the same number of protons but different number neutrons |
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What is the formula for relative atomic mass? |
Total mass of atoms ÷ total number of atoms |
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How did Mendeleev arrange his periodic table? |
In order of increasing relative atomic mass. Leaving gaps for missing elements |
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How is the modern periodic table arranged? |
In order of increasing atomic mass |
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How electrons are in the 1st, 2nd and 3rd shell? |
2 8 8 |
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What is the elements period linked to? |
The number of shells |
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What is an elements group linked to? |
The number of electrons in its outer shell |
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What is an ion made of? |
A metal atom that has lost electrons. A non-metal atom that has gained electrons |
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What are positively and negatively charged ions called? |
+ cations - anions |
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What forces are ionic bonds? |
Electrostatic forces |
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Name some properties of ionic compounds. |
High melting/boiling points Conductor of electricity when liquid or aqueous |
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What does -ide -ate mean? |
-ide means 2 elements -ate means 3 or more elements, one of which being oxygen |
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What is a covalent compound made of? |
Two non-metals |
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Name some properties of simple covalent compounds. |
Low melting/boiling points Doesn't conduct electricity |
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Name some properties of giant covalent compounds. |
High melting/boiling points Insoluble in water Doesn't conduct electricity (graphite an exception) |
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Name sime properties of metals. |
Shiny Good conductors of electricity and heat High melting points High density Malleable |
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What is the empirical formula? |
The formula of a compound in its simplest ratio |
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What is the law of conservation of mass? |
No atoms are created or destroyed, so mass stays the same during a chemical reaction. |
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What is the formula for concentration? |
Mass ÷ volume |
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What is avogadro's constant? |
6.02 × 10^23 |
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What is the formula for number of moles? |
Moles = mass ÷ mr |
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What is a limiting reactant? |
When a reactant is fully used up |
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How do you make a soluble salt? |
Reacting an acid with a suitable insoluble reactant |
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What does a titration reaction do? |
Determines the volume of an alkaline solution needed to neutralise an acid. |
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How close do results have to be for them to be concordant? |
Within 0.20cm cubed |
