Atomic Structure
what is positive in an atom
protons
noble gases belong to which group
group 18
How many single covalent bonds can halogens form
1
How does the alpha decay of a nucleus cause the nucleus to change
The number of neutrons and the number of protons decrease
What type of relationship did Einstein state there was between energy and mass?
equal
what is in the cloud region of the atom
electrons
true or false group 18 is nonmetal
true
A compound has the formula X3Y. For every 15 X atoms present in this compound, how many Y atoms are there
5
Carbon-14 and carbon-12 have the same number of protons but a different number of neutrons. These different forms of the same element are called
isotopes
What is the term for an ongoing series of nuclear reactions?
chain reactions
what has a neutral charge in a atom
neutrons
what group is most reactive
alkali metals
Which is described as the force holding atoms together
Chemical Bond
In a radioactive nucleus, the electric force _____ the strong force.
is overpowered by
During nuclear fission, a nucleus _________.
divides
are atoms of the same element that have different numbers of neutrons
isotope
what gases are most reactive
halogens
Which property describes how much energy must be added to an atom to remove an outermost electron
ionization energy
The mass number of a nucleus is equal to
the number of protons plus the number of neutrons
When two smaller nuclei come together, it is called ________.
nuclear fusion
the number of protons and neutrons added together is the
mass
what metals are in group 2
alkaline earth metals
Which is true of binary ionic compounds
They consist of atoms of only 2 element types
What are found in the nucleus of an atom
protons and neutrons
Only nuclei with _________ atomic numbers can undergo fission.
large