Subatomic Particles
What determines an element's identity?
PROTONS
Which 3 subatomic make up an atom?
Protons, Neutrons, Electrons
How many electrons does the element Boron (B) have?
5 Electrons
Electrons are bound to the nucleus by the attractive force between electrons (-) and protons (+). Known as the
electromagnetic force
What two subatomic particles make up the atomic mass?
Protons and Neutrons
What is the definition of an isotope?
the same element that contain equal numbers of protons but different numbers of neutrons
How many electrons does the element Lithium (Li) have?
3
# of PROTONS =
ATOMIC NUMBER
What two subatomic particles make up the nucleus of an atom
Protons and nuetrons
What does the number represent in the isotope notation below?
Carbon-14
Atomic mass
What is the atomic number for the element Bromine (Br) have?
35
# of NEUTRONS
Atomic Mass - Atomic #
Which subatomic particle was discovered FIRST?
HINT this subatomic particle has a negative charge
Electrons
Carbon -15
or 15 C
6
What symbol appears on the periodic table for the element with the atomic number 30?
Zn
How many neutrons are present in an aluminum atom that has an atomic number of 13 and a mass number of 27?
14
We say an object is electrically neutral when its total electric charge is
zero.
Which of the following has the greatest atomic mass?
A. tritium
B. protium
A. tritium
Draw a model of Aluminum (Al) on the board. It must include protons, neutrons, and electrons.
Protons- 13
Electrons-13
Neutrons-14
If an element has 8 p, 9n, 8 e. Is it a isotope of not?
Isotope. Oxygen has 8 protons, 8 electrons, 8 neutrons. The isotope is Oxygen 17