WorksheetsChemical Bonds & Equations
Total questions: 19
Worksheet time: 38mins
Why are some elements more stable on their own while others are more stable in compounds?
Some elements can never be stable.
2 elements are always better than 1.
It depends on how many valence electrons they have. They want 8 total.
It depends on how many protons they have.
An atom that has gained or lost electrons is called a(n)_____.
Ion
Isotope
Metalloid
Element
Which of the following has GAINED an electron?
Negative ion
Positive ion
Non polar ion
Polar ion
A bond that forms between atoms when they share electrons is a(n) ______ bond.
Ionic
Covalent
Polyatomic
Electrical
An atom is ______ when the outer energy level is filled with electrons.
Full
Positive
Reactive
Stable
A _________ __________ is formed when atoms gain, lose or share electrons.
Double ion
Chemical record
Chemical bond
Single element
Determine the number of each atom in the formula for calcium acetate: Ca(C2H3O2)2
Ca-2, C2, H-3, O-2
Ca-1, C-2, H-3, O-2
Ca-2, C-4, H-6, O-4
Ca -1, C-4, H-6, O-4
Why can electrons be transferred from atom to atom, but protons cannot?
Protons are negatively charged.
Changing the # of protons changes what the element is.
Electrons can NOT move from atom to atom.
In the chemical formula below, the 2 in front of the H2O is called a _________?
2H2 + O2 -> 2H2O
Subscript
Coefficient
Superscript
Yields
Identify the part of the chemical reaction below in red:
NiCl2 --> Ni + Cl2
Products
Reactants
Yields
Subscripts
Identify the part of the chemical reaction below in red:
NiCl2 --> Ni + Cl2
Product
Reactant
Yields
Subscript
Determine the total number of atoms in the following compound:
Ca(NO3)2
6
7
8
9
Determine the formula for the following compound:
Zinc Hydroxide
(Zn2+, OH-)
Zn2OH
Zn(OH)2
How many electrons are needed for elements in Group 17 to be stable?
17
9
19
7
Identify the part of the chemical reaction below in red:
NiCl2 --> Ni + Cl2
Product
Reactant
Yields
Subscript
The elements of Group 18, called the ____ _____, rarely combine with other elements.
Halogens
Noble gases
Metalloids
Non-metals
Identify the part of the chemical formula in red:
PO43-
Superscript
Subscript
Coefficient
Product
What type of chemical bond is formed when electrons are transferred from atom to atom?
Ionic
Covalent
Electric
Magnetic
In the formula for carbon dioxide, what is the number 2 in red called?
CO2
Superscript
Subscript
Coefficient
Product
