PHYS. chpt. 11
Compared to the mass of a hydrogen atom, the mass of an oxygen atom is..
16 times as great
What is the molecular mass of a water molecule?
18 amu
How many individual atoms are in a water molecule?
3
How many atoms are in a molecule of ethanol, C2H6O?
9
An atomic mass unit (amu) is 1/12 the mass of...
A carbon atom
The smallest particle of those listed below is a quark/a neutron/a molecule/an atom/a proton
A quark
As the text cites, atoms are incredibly tiny, numerous, perpetually moving, and what else?
Ageless
If two protons and two neutrons are removed from the nucleus of an oxygen atom, what nucleus remains?
Carbon
If two protons are removed from an oxygen nucleus, the result is...
Carbon
The chemical properties of matter come mostly from its...
Electrons
The volume of matter comes mostly from its...
Electrons
Which of the following are negatively charged?
Electrons
Which of these atoms has the largest number of neutrons in the nucleus?
Gold
If one neutron is added to a helium nucleus, the result is...
Helium
Which of the following is an element? H20/Hydrogen/Carbon Dioxide/a supernova
Hydrogen
What element results if you add a pair of protons to the nucleus of mercury? (See the periodic table in the Study Area.)
Lead
The charge in the nucleus of an antimatter hydrogen atom is...
Negative
If two protons are added to an oxygen nucleus, the result is...
Neon
If no molecules in a body could escape, would the body have any odor?
No
The weight of matter comes mostly from its...
Protons and neutrons
Rank the number of shells in these noble-gas atoms from most to least: argon, radon, helium, neon.
Radon, argon, neon, helium
Consult the periodic table and rank these atoms, from most to least, by their mass: calcium, strontium, lithium, oxygen.
Strontium, calcium, oxygen, lithium
The number of atoms in a common water molecule is...
THREE
How many different elements are in a water molecule?
TWO
TRUE OR FALSE. Molecules are the smallest subdivision of matter that still retains chemical properties of a substance.
True
How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when there is an electric current through it?
Two
Which of these atoms has the greatest amount of electrical charge in its nucleus: helium, uranium, carbon, iron, gold
Uranium
Which of these atoms has the greatest number of electrons: gold, uranium, iron, helium, carbon
Uranium
Which of these atoms has the most mass? lead/uranium/hydrogen/iron
Uranium
Which of the following is not an element: hydrogen, carbon, oxygen, water?
Water
Nuclei of atoms that make up a newborn baby were made in...
ancient stars
A force that determines the chemical properties of an atom is a(n)...
electrical force
To become a negative ion, does an atom lose or gain an electron?
gains
When carbon and oxygen atoms combine, energy is...
given off by the reaction
An important feature of atoms is that they..
have wave properties
Which has the greatest number of protons in its nucleus: gold / silver / mercury / lead
lead
To become a positive ion, does an atom lose or gain an electron?
loses
The reason a granite block is mostly empty space is that the atoms in the granite are...
mostly empty space themselves.
Which of the following are electrically neutral? electron/neutron/proton/ion
neutron
Solid matter is mostly empty space. The reason solids don't fall through one another is because...
of electrical forces.
In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of...
orbital electrons
Dark matter is considered to be...
plentiful in the universe
Brownian motion has to do with the...
random motions of atoms and molecules.
In our part of the universe, antimatter is...
short-lived
Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, then we probably breathe one of those atoms with each...
single breath
If we doubled the magnifying power of the most powerful optical microscope in the world, we would...
still not be able to see or photograph an atom.
What makes an element distinct?
the number of PROTONS
Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are...
the same age
There are about as many atoms of air in our lungs at any moment as there are breaths of air in the atmosphere of...
the whole WORLD!
Atoms heavier than helium were made by...
thermonuclear fusion
