SCI 221 EXAM QUESTIONS AND ANSWERS
LATEST UPDATE
Atom
The smallest unit of an element that retains the unique properties of that element.
What are subatomic particles?
The particles that make up the parts of an atom. (protons, neutrons, electrons)
Define proton, then identify its charge and location.
Positively charged subatomic particles that have mass and are located in the nucleus of
an atom.
Name the neutrally charged subatomic particle that is located in the nucleus of an
atom.
Neutron
Define an electron, then identify its location and charge.
Negatively charged subatomic particles that are located in the electron cloud of an
atom.
Name the center of an atom where protons and neutrons are located.
Nucleus
What is a negatively charged ion called?
Anion
What is the name of a positively charged ion?
Cation
What is the name of an attraction that holds atoms in the same vicinity?
Bond
Distinguish an ionic bond from a bond by defining it.
An attraction of two oppositely charged ions due to their opposite electrical charges.
Name a neutral chemical compound formed between cations and anions using an
ionic bond.
Salt
Define a covalent bond.
An atomic attraction in which electrons are shared between atoms.
What is an atomic attraction in which electrons are shared equally between atoms
called?
Nonpolar Covalent Bond
Define a polar covalent bond.
An atomic attraction in which electrons are shared unequally between atoms.
Define a hydrogen bond.
An atomic attraction in which partially positive hydrogen atoms in a polar covalent bond
are attracted to electronegative atoms.
What is a group of two or more atoms connected by a covalent bond called?
Molecule
An organic compound contains _______ in its chemical structure?
Carbon
LATEST UPDATE
Atom
The smallest unit of an element that retains the unique properties of that element.
What are subatomic particles?
The particles that make up the parts of an atom. (protons, neutrons, electrons)
Define proton, then identify its charge and location.
Positively charged subatomic particles that have mass and are located in the nucleus of
an atom.
Name the neutrally charged subatomic particle that is located in the nucleus of an
atom.
Neutron
Define an electron, then identify its location and charge.
Negatively charged subatomic particles that are located in the electron cloud of an
atom.
Name the center of an atom where protons and neutrons are located.
Nucleus
What is a negatively charged ion called?
Anion
What is the name of a positively charged ion?
Cation
What is the name of an attraction that holds atoms in the same vicinity?
Bond
Distinguish an ionic bond from a bond by defining it.
An attraction of two oppositely charged ions due to their opposite electrical charges.
Name a neutral chemical compound formed between cations and anions using an
ionic bond.
Salt
Define a covalent bond.
An atomic attraction in which electrons are shared between atoms.
What is an atomic attraction in which electrons are shared equally between atoms
called?
Nonpolar Covalent Bond
Define a polar covalent bond.
An atomic attraction in which electrons are shared unequally between atoms.
Define a hydrogen bond.
An atomic attraction in which partially positive hydrogen atoms in a polar covalent bond
are attracted to electronegative atoms.
What is a group of two or more atoms connected by a covalent bond called?
Molecule
An organic compound contains _______ in its chemical structure?
Carbon
