Elements
Draw that!
Bonding
More Bonding
Reactions
100
What is a part of the atom that has a negative charge?
an electron
100
Draw an atom of Carbon.
6 protons, 6 neutrons, electron configuration 2, 4
100
This kind of bonding means a metal bonds with a nonmetal.
ionic bonding
100
This kind of bonding uses a sea of electrons.
Metal bonding
100
What needs to happen for a reaction to happen?
particles need to collide with enough force
200
This is something that is made of two or more different atoms.
a compound
200
Draw the bond for hydrogen gas.
2 hydrogen atoms with single covalent bond.
200
In Lithium Chloride, lithium changes to become an ion with this charge.
Li+ (1+)
200
Give example of silicon dioxide allotropes.
glass and sand
200
What happens in an exothermic and endothermic reaction?
In an exothermic reaction, reactant create a product by losing energy and increasing heat. In an endothermic reaction, reactant create a product by taking in energy and decreasing temperature.
300
What is the atomic weight of a proton?
1
300
Why does surface area affect the rate of reaction?Draw something with large and small surface area.
Draw the particles on the surface and show why they react faster on a larger surface area.
300
Covalent bonds are formed between these.
nonmetal and nonmetal
300
Why does graphite conduct electricity?
Graphite are carbon atoms bonded in layer, connected by disaccociated electrons which can conduct electricty.
300
What are the 2 formulas used for measuring the rate of reaction?
Rate of reaction = amount of reactants used / time Rate of reaction = amount of product created / time
400
What is the mass number of OXYGEN?
16
400
Draw the bond for Magnesium chloride.
1 magnesium and 2 chlorine atoms, Mg becomes positive (2+) and Cl becomes negative(1-).
400
What is the chemical formula for Beryllium oxide?
BeO
400
What is the difference between giant and simple molecular covalent bonds?
Simple molecular covalent bonds have low melting points and giant covalent bonds have high melting points betcause the atoms are connected to more atoms.
400
When you put magnesium (Mg) into hydrochloric acid (HCl) it produces magnesium chloride and hydrogen gas. Write the word equation.
Magnesium + Hydrochloric acid = Magnesium chloride + hydrogen(gas)
500
What is the electronic configuration of Lithium?
2,1
500
Why is an alloy sometimes stronger than a pure metal?
draw pure metal with equal size particles, and then an alloy with unequal particles not in rows.
500
What is the chemical formula for Potassium oxide?
K2O
500
Why do ionic compound solutions or molten ionic compounds conduct electricity?
The free movement of the ions created free electrons.
500
When you put magnesium (Mg) into hydrochloric acid (HCl) it produces magnesium chloride and hydrogen gas. Write the symbol equation.
Mg + 2HCl = MgCl2 + H2
M
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n
u