Chapter 2 Quiz Flashcards
(21 cards)
Any substance in the universe that has mass and occupies space
Matter
The type of bond that forms between two atoms when electrons are shared is a(n) _______________ bond.
Covalent
The mass number of an atom is the:
the number of protons plus the number of neutrons.
What property of water is NOT attributable to hydrogen bonding between water molecules?
Polarity
If an element has an atomic number of 6 and a mass number of 14, how many neutrons does it have?
8
The ___________________ of atoms determine how atoms will react with each other.
electrons
_____________ allows water molecules to stick together and form droplets.
cohesion
A solution with a pH of 4 has _________ the concentration of H+ present compared to a solution with a pH of 5.
10 times
___________________ bonds are needed for complex shapes of large organic molecules.
Directional
The nucleus of an atom is composed of two subatomic particles, ______________ and _____________.
protons; neutrons
What has the least amount of mass
electron
Which is not correct about water molecules?
Hydrogen is more electronegative than oxygen.
The atomic number of an atom is the:
number of protons only
Atoms that bear a positive or negative charge are known as:
ions
The high surface tension of water that allows some insects to literally walk on water is due to:
cohesion
When an electron is transferred from one atom to the next, and the two atoms are then electrically attracted to one another, the type of bond is a(n) __________________ bond.
ionic
The second shell in an atom contains ________ orbitals and holds up to ________ electrons.
4;8
In an neutral atom, protons are always:
equal to the electrons
The first shell in any atom contains one orbital which contains:
2 electrons
The volume of space around a nucleus where an electron is most likely to be located is called the _______________ of that electron.
orbital
Electrons possess energy of position, also known as _____________ energy.
potential
