I have an object that is dull, brittle, and an insulator, what is it?
Nonmetal
What is a mixture?
a combination of different things
Is this a physical or a chemical change? freezing point
physical change
What is a Compound?
Two or more elements combined; more than one capital letter.
What is the formula for copper(I) sulfate?
Cu2SO4
What is krypton? Element, Compound, Mixture
Element
What is an Atom?
The smallest particle or piece of a pure substance.
When two nonmetals do not share electrons evenly, the resulting covalent bond will be
Polar
Mention an element which is similar to Li
Na, K, Ru, Cs, Fr
The proper formula for magnesium hydroxide:
Mg(OH)2
When a nonmetal gains electrons, it becomes this type of ion.
Anion
What atom matches this electron configuration? 1s^2 2s^2 2p^6 3s^2
Magnesium
In which mixture can you not see all of the parts?
homogeneous
Is this a physical or a chemical property? a change of one substance to another
chemical change
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
When metals bond with non-metals they form what type of bonds
Ionic
According to the octet rule most elements need _______ valence electrons.
8
Is this a physical or a chemical change? corrosion of a bicycle frame
chemical change
How are covalent bonds explained?
When the atom shares an electron with an another atom
A salad is an example of a __________.
heterogeneous mixture
Is this a physical or a chemical change? sharpening a pencil
physical change
How many electrons can the d sublevel hold?
10
Mention a property of metals
solid, malleable, ductile, high boiling andmelting point
Are the atoms more stable when they are bonded together or when they are apart?
Bonded Together
What is the correct formula for Sodium Oxide?
Na2O
What region of the periodic table contains atoms that form covalent bonds?
the right side
Which element is the least reactive? Li, B, C, or Ne
Ne
The name of FeCl₂ is
Iron (II) chloride
What two types of atoms make a covalent bond?
2 nonmetals
What is the name of the compound Na2(SO4)?
Sodium sulfate
In which mixture can you see all of the parts?
heterogeneous
The weaker the intermolecular forces of a substance the _____________ the boiling point
Lower
What element in Period 4 has 5 valence electrons?
As
What is the chemical symbol for Titanium
Ti
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
Your experience on this site will be improved by allowing cookies.