WorksheetsBasic Chem for Biology
Total questions: 25
Worksheet time: 13mins
___________electrons are involved in chemical bonds.
inner
valence
Charged
answer not given
The nucleus of an atom has a ___________charge
neutral charge
overall positive charge
negative charge
partial
Electrons are located outside of the __________
nucleus
electron cloud
valence shell
atom
answer not g8iven
An ionic bond occurs when electrons _________
are shared
are exchanged
neutral atoms are created
split in half
answer not given
Protons have a __________charge.
postive
negative
neutral ( no charge)
Electrons have a __________charge
positive
negative
neutral ( no charge)
In a polar covalent bond electons are shared equally.
true
false
All compounds have ionic or covalent bonds.
true
false
The line in the diagram represents what?
2 electrons shared in a bond
2 protons shared in bond
an exchange of electrons in a bond
answer not given
What is identified by the line in this picture
ionic bond
covalent bond
polar bond
hydrogen bond
What type of bond is represented by the double lines in the diagram?
ionic bond
single covalent bond
double covalent bond
triple covalent bond
hydrogen bond
What do the three lines represent
ionic bond
single covalent bond
triple covalent bond
double covalent bond
hydrogen bond
Classify this substance: NaCl
element
compound
mixture
Classify: O ( oxygen)
element
compound
mixture
The blue arrows indicate what?
The number of atoms in formula
number of molecules in formula
answer not given
The blue arrows refer to what?
subscripts
coefficients
molecules
charge
The red arrows indicate what?
number of molecules or formula units ( compounds)
number of atoms
charge
answer not given
The red arrows indicate what?
subscripts
coefficients
atoms
charge
how many total atoms of Hydrogen are represented in the chemical formula of Hydrogen on the reactant side?
2
4
6
3
answer not given
What do the symbols identified represent?
a) ions
b)slightly charged + and - ends
c) polar covalent bonds
d) answer 2 and 3 ( b and c)
e)answer not given
What does this picture represent?
polar bonds and polar molecule
non polar bonds and non polar molecule
ionic bonds and non polar molecule
polar bonds but a non polar molecule
Hydrogen bonds occur between __________
2 nonmentals
a metal and nonmetal
2 nonpolar covalent molecules
2 polar covalent molecules
2 atoms
What is represented by the dotted lines in the diagram?
ionic bond
hydrogen bond
covalent single bond
double covalent bond
answer not given
Covalent compounds come in many shapes.
true
false
What is pictured? Select most thorough...
polar molecule
nonpolar molecule
polar molecule with polar bonds
nonpolar molecule but with polar bonds
