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WorksheetsScience 8
Total questions: 14
Worksheet time: 14mins
Atoms became ions when they
gain or lose protons
gain or lose electron
gain or lose neutron
gain or lose
What is found in the nucleus of an atom?
electrons
neutrons and protons
electrons ,neutrons and protons
neutond
An atom as a whole is
electrically neutral
negatively charged depending on the number of electron
positively charged depending on the number of protons
either negatively and positively charged depending on the number of electrons and protons
A molecule consists of
mixture of two elements
pure substance of elements
two atoms joined chemically
two or more atoms joined chemically
Ions that are deficient in electrons have
negatively charge atoms
positively charge atoms
neutrally charged ions
istopes
What is the atomic number of a CL which has 17 protons and 18 neutrons?
1
17
18
35
is a chemical bond that involves the sharing of electron pairs between atoms.
ionic compound
monoatomic ions
covalent compounds
poly atomic ions
Which one is the molecular name for CBr4
carbon tribromide
monocarbon tetrabromide
carbon tetrabromide
carbon petrabromide
Enthalphies of fusion in molecular compound
10-100%
1-10%
20-30%
50%
A Greek philosopher who was the first person to use the term atom
Aristotle
John Dalton
Democritus
James Chadwick
is the English Physicist who discovered Neutrons
James Chadwick
Democritus
Aristotle
John Dalton
It refers to the tendency of atoms to prefer to have eight electrons in the valence shell.
nomenclature
chemical bonds
ionization
octet rule
NaCl is an example of
covalent compouns
monatomic ions
ionic compound
polyatomic ions
CO2 is an example of
monatomic ions
covalent compounds
ionic compounds
polyatomic ions
