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Chemistry 2nd term
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The weaker the intermolecular forces of a substance the _____________ the boiling point
Lower
According to the octet rule most elements need _______ valence electrons.
8
When two nonmetals do not share electrons evenly, the resulting covalent bond will be
Polar
Are the atoms more stable when they are bonded together or when they are apart?
Bonded Together
What region of the periodic table contains atoms that form covalent bonds?
the right side
How are covalent bonds explained?
When the atom shares an electron with an another atom
What two types of atoms make a covalent bond?
2 nonmetals
The proper formula for magnesium hydroxide:
Mg(OH)2
When a nonmetal gains electrons, it becomes this type of ion.
Anion
When metals bond with non-metals they form what type of bonds
Ionic
What is the formula for copper(I) sulfate?
Cu2SO4
What is the correct formula for Sodium Oxide?
Na2O
What is the name of the compound Na2(SO4)?
Sodium sulfate
The name of FeClâ‚‚ is
Iron (II) chloride
What element in Period 4 has 5 valence electrons?
As
Identify the element in Period 5 that has 1 valence electron?
Ru
What atom matches this electron configuration? [Xe] 6s^2 4f^14 5d^9
Gold
What is this element? 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6
krypton
How many electrons can the d sublevel hold?
10
What atom matches this electron configuration? 1s^2 2s^2 2p^6 3s^2
Magnesium
Students in Mrs. Clark's science class are investigating a substance that has the following properties -shiny -bends easily -hard, not easily broken Based on these properties how would you classify the substance?
metal
Which element is the least reactive? Li, B, C, or Ne
Ne
Mention an element which is similar to Li
Na, K, Ru, Cs, Fr
Mention a property of metals
solid, malleable, ductile, high boiling andmelting point
I have an object that is dull, brittle, and an insulator, what is it?
Nonmetal
What is a Compound?
Two or more elements combined; more than one capital letter.
What is an Atom?
The smallest particle or piece of a pure substance.
What is the chemical symbol for Titanium
Ti
What is krypton? Element, Compound, Mixture
Element
A salad is an example of a __________.
heterogeneous mixture
What is a mixture?
a combination of different things
In which mixture can you not see all of the parts?
homogeneous
In which mixture can you see all of the parts?
heterogeneous
Is this a physical or a chemical property? a change of one substance to another
chemical change
Is this a physical or a chemical change? corrosion of a bicycle frame
chemical change
Is this a physical or a chemical change? freezing point
physical change
Is this a physical or a chemical change? sharpening a pencil
physical change
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