physics chapter 11
How many individual atoms are in a water molecule?
3
A nucleus with an atomic number of 44 and a mass number of 100 must have
56 neutrons.
As the text cites, atoms are incredibly tiny, numerous, perpetually moving, and what else?
Ageless
Which of these atoms has the largest number of neutrons in the nucleus? Helium Hydrogen Gold Carbon
Gold
Which of these statements is true?
Molecules are the smallest subdivision of matter that still retains chemical properties of a substance
Which of the following is not a compound? ammonia salt air water
air
A molecule has... energy. structure. mass. all of these
all of these
Which contains more atoms: 1 kg of lead or 1kg of aluminum?
aluminium
A positron orbiting an antiproton would make up an atom of
anti-hydrogen
The periodic table of the elements is a list of _______.
atoms
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
A force that determines the chemical properties of an atom is a(n)
electrical force.
The chemical properties of matter come mostly from its
electrons
When carbon and oxygen atoms combine, energy is
given off by the reaction
An important feature of atoms is that they _______.
have wave properties
If one neutron is added to a helium nucleus, the result is
helium
Which of the following is an element? A supernova H2O Hydrogen Carbon dioxide
hydrogen
The reason a granite block is mostly empty space is that the atoms in the granite are
mostly empty space themselves.
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
Which of the following are electrically neutral?
neutron
If no molecules in a body could escape, would the body have any odor?
no
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
What element results if two protons and two neutrons are ejected from a radium nucleus?
radon
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
Atoms heavier than helium were made by
thermonuclear fusion
Which of these atoms has the greatest amount of electrical charge in its nucleus? uranium helium carbon iron gold
uranium
Which of the following is not an element: hydrogen, carbon, oxygen, water?
water
