Atoms Test Flashcards
What particles are atoms composed of?
Atoms are composed of different combinations of protons, neutrons, and electrons.
What charge does a proton give off?
Protons give off a positive charge.
What charge does a neutron give off?
Neutrons give off no charge because they are neutral.
What charge does an electron give off?
Electrons give off negative charges.
Where do the protons and neutrons reside in an atom?
The protons and neutrons reside in an atoms nucleus.
Where do electrons reside in an atom?
Electrons are NOT found in the nucleus of an atom. Instead they are found in an atoms orbital.
What does the atomic number of an atom represent?
The atomic number represents the number of protons in an atoms nucleus.
What does the atomic number of an atom represent?
The atomic number represents the number of protons in an atoms nucleus.
What does the atomic mass of an atom represent?
The atoms mass represents the total number of particles in an atoms nucleus.
Element Symbol Definition:
1 or 2 letter internationally agreed code for an element.
Element name Definition:
An elements common name
How do you solve for neutrons?
Take the atomic mass of an element minus the atomic number.
Electron Shell Definition
“orbit” followed by electrons around the nucleus of an atom
How many electrons can shell #1 hold
Shell Label: K Number of Atoms: 2
How many electrons can shell #2 hold?
Shell Label: L Atoms: 8
How many electrons can shell #3 hold?
Shell Label: M Amount of Atoms: 18
How many electrons can shell #4 hold?
Shell Label: N Amount of Atoms: 32
How do you use the atomic number to complete an electron shell diagram?
The atomic number=# of protons=# of electrons. So fill out the number throughout the shells.
Periodic Table Definition:
A tabular arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties. Elements are presented in order of increasing the atomic number, (the number of protons in the nucleus.
Groups or families on the periodic table definition:
Vertical columns of the periodic table (18 in total)
Elements in the same group have similar characteristics.
Periods on a periodic table definition
Horizontal rows of the periodic table (7 in total)
Elements in the sane period do not have similar properties
What is a valence electron?
Electrons farthest away from the nucleus of an atoms involved in the formation of chemical bongs
Can range from 1-8
Definition of an Electron Dot Diagram
A representation of the number of valence electrons in an atom, using dots placed around the element symbol.
Each dot represents one valence electron
How to find a valence electron?
If you make a shell diagram for an element, the outermost shell will tell you how many valence electrons are in it. Or if you know what group the element is in, look at the number in the ones place.
