Atoms
Where are the protons located in an atom?
The nucleus
Mass Number=
Protons + Neutrons
The atom is made up of 3 subatomic particles called...
Protons, neutrons, and electrons
Isotopes are atoms of the same element that have different
a. numbers of protons. b. number of neutrons. c. numbers of electrons.
B. different number of neutrons
What are the vertical columns on the Periodic Table called?
Groups/families
What charge do atoms have overall?
0
Changing the proton number results in...
A new element
Where are the electrons located in an atoms?
In electron shells surrounding the nucleus. (or electron cloud)
Chlorine has atomic number 17 and mass number 35. How many protons, neutrons, and electrons does it have?
17 protons, 18 neutrons, 17 electrons
What are the horizontal rows on the Periodic Table called?
Periods
Which is larger, the atomic number, or the mass number?
Mass number
Which subatomic particle of the atom is the lightest?
Electrons
Isotopes are atoms of different elements.
False
What is the mass number of oxygen?
16
What element is located in group 2, period 6
Barium
Why do atoms have no overall charge?
Because the negative electrons cancel out the positive protons (the number of both is equal).
What on the periodic table equals the number of protons in an atom's nucleus?
Atomic Number
Most of the mass of an atom is located...
Inside of the nucleus
The listed relative atomic mass on the periodic table is closest to...
That element's most abundant isotope
What are the elements in group 8 known as?
Nobel Gases
What is the charge of an atom with 24 protons, 24 neutrons, and 26 electrons?
-2
In the isotope Silicon-28, the number 28 represents the ...
The mass number
The region outside the nucleus where an electron can most probably be found is the
What is electron cloud?
What two mathematical values must you use to calculate the relative atomic mass for any element?
Relative abundance and mass of each isotope
What charge does Fluorine have?