Atomic Structure and Types of Atoms Notes

Atomic Structure and Types of Atoms
Atomic Structure
The ___________________________
of an atom contains _____________________________
___________________________ that together make up nearly all of an atom’s _____________.
The only exception
is the nucleus of the _____________________________atom, which usually consists of a
single ________________________.
A ____________________________________________
made of a series of energy levels occupies
__________________________________________ of an atom.
Size of an Atom If the nucleus of an atom were the size of a pencil eraser on home plate of this baseball field,
its electrons could be farther away than the outfield.
A carbon atom consists of protons and neutrons
in a nucleus that is surrounded by electrons.
Applying Concepts What effect do the neutrons
in the nucleus have on the atom’s electric
Comparing Particle Masses
__________________________ occupy most of an atom’s _____________________, they don’t
account for much of its mass.
takes almost ____________________ electrons to equal the mass of just ____________________.
the other hand, a proton and a neutron are about ______________________________________.
the _____________________________________ make up nearly ___________________
___________________ of an atom.
are _______________ to be measured in everyday units of mass, such as grams or kilograms.
scientists use units known as __________________________________________________.
proton or a neutron has a mass equal to about ______________________________.
The mass
of an electron is about _________________________________.
Atoms and Elements
element consists of ____________________________________________ from the atoms of all other
One thing that
makes each atom different is the __________________________________________ found in
its nucleus.
have the same number of protons.
an element ________________________________________________ by the number of protons
in the nucleus of its atoms.
Atomic Number
Every atom
of an element has the _____________________________________________________.
For example, the nucleus of every carbon atom contains ________________________________.
Every ____________________________
atom has 8 protons, and every _______________ atom has 26
element has a unique atomic number—____________________________________________
atomic number is 6, oxygen’s is 8, and iron’s is 26.
Although all atoms of an element have the same number of protons, their number of ______________ can vary.
with the same number of protons and a different number of neutrons are called
_________________________________ (eye suh tohps).
Three isotopes
of carbon are illustrated in Figure 3.
carbon atom has 6 protons, but you can see that the number of neutrons is ________________.
isotope is identified by its mass number, which is the sum of the protons and neutrons in the nucleus of an
The most
common isotope of carbon has a mass number of 12 (6 protons + 6 neutrons) and may be written as
other isotopes are carbon-13 and carbon-14.
shown in Figure 3, a symbol with the mass number above and the atomic number below may also be used
to represent an isotope.
these carbon atoms have different mass numbers, all carbon atoms react the same way chemically.
Isotopes Atoms of all isotopes of carbon contain 6 protons, but they differ in their number of neutrons.
Carbon-12 is the most common isotope.
Interpreting Diagrams Which isotope of carbon has the largest mass number? __________________
can also change the number of _________________________ they have.
atom with an __________________ number of protons and electrons is electrically __________________.
can _____________________________________________________ electrons with other atoms.
an atom has more or less electrons than protons, it is called an _____________.
are __________________________________________.
can either have __________________________ which would result in an overall ___________________
_______________ atom, or ________________________________ which would result in an overall
Fill in the chart below with the three particles found in an atom.
Size (amu)
Diagram of an atom: Draw and label and atom with 7 protons, 7 neutrons, and 7 electrons