Random knowledge
The atomic number is the number of ____ in the nucleus of an atom.
Protons
Verticals columns in table are classified as
Groups
Atomic mass equals
The weight of the protons and neutrons in the nucleus
These subatomic particles are housed in shells orbiting the nucleus
Electrons
An element is only created of one type of
Atom
What is the electrical charge on a proton?
Positive
Horizontal lines are
periods
Potassium has an atomic number of 19 and a mass number of 39. How many neutrons are there?
20
Protons, neutrons, and electrons are subatomic particles in an...
Atom
particles made of neutrally charged subatomic particles called
Neutrons
How many electrons can be in 1st shell, 2nd shell, 3rd shell and 4th shell?
2-8-8-6
According to the periodic table, which group does Neon (Ne) belong to? ( remember it all the way on right side )
18
A typical atom of aluminum has 13 electrons and 14 neutrons. How many protons does the atom have?
13
What makes up the mass number of an element?
Protons and neutrons in the nucleus
Which part of the atom is so small it contributes very little to the mass of an atom?
Electrons
Carbon has 6 protons so they have ____ electrons ?
6
Three main sections in periodic table
Metals , non-metals and metalloids
What is the atomic mass of an atom with 5 protons, 5 neutrons, and 5 electrons?
10
The electrically neutral subatomic particle in the nucleus of an atom is the
Neutrons
Most of an atom's mass is concentrated in the...
Nucleus
The distance between the nucleus and the electrons of an atom
So great that atoms are mostly empty space
Metalloids have characteristics of
Metals and non metals
The atomic mass of an element is the combined mass of
All subatomic particles ( electrons protons and neutrons — electrons are so small so majority is protons and neutrons)
The number of electrons in a neutral atom is equal to the number of
protons
Which is made of only one kind of atom and cannot be broken down into a simpler substance?
Element