Atomic Structure Flashcards
If an atom has an atomic number of 35 and has 40 neutrons, it has a mass number of _____.
75
The _____ is the particle with a negative charge.
electron
If an atom has an atomic number of 23 and has 15 neutrons, it has _____ electrons.
23
If an atom has 35 positive particles, it has _____ negative particles.
35
The proton has a _____ charge.
positive
The _____ are located in the nucleus.
protons and neutrons
The _____ are located outside the nucleus.
electrons
The _____ is the particle in the atom with no charge.
neutron
The _____ have the same mass.
protons and neutrons
The proton has a mass of _____ amu.
1
The electron has a mass of _____ amu.
0
The neutron has a mass of _____ amu.
1
True/False: The nucleus is about the same size as the electron cloud.
False
If the atom where the size of a stadium, the nucleus would be the size of ___. (the stadium, a car, a bleacher, or a marble)
a marble
Atom #1 has 14 protons, 15 neutrons, and 14 electrons.
Atom #2 has an atomic number of 14 and a mass number of 30.
These atoms are ____. (different elements or isotopes)
isotopes
Atoms with the same number of protons but different number of neutrons are called _____.
isotopes
An atom has 1 proton and a mass number of 1. It has _____ neutrons.
0
The _____ number identifies the element.
atomic
The _____ number is the size of the atom.
mass
An atom has 10 electrons and a mass number of 22. It has _____ neutrons.
12
Atom #1 has 4 electrons and 6 neutrons.
Atom #2 has an atomic number of 6 and a mass number of 10.
These atoms are _____. (different elements or isotopes)
different elements
An atom has 10 electrons and a mass number of 22. It has an atomic number of _____.
10
This is the central core of the atom
nucleus
This surrounds the central core
electron cloud
All of the mass of the atom is located here.
nucleus
This part of the atom has no mass.
electron cloud
Atoms that are isotopes have different ___ numbers.
mass
Atoms that are isotopes have the same ___ numbers.
atomic
Atoms that are isotopes have the same number of ____.
protons
Atoms that are isotopes have different numbers of ___.
neutrons
When atoms lose energy, their electrons move ____.
down to lower energy levels
How many electrons can be in the first energy level?
2
How many electrons can be in the second energy level?
8
How many electrons can be in the third energy level?
18
When atoms gain energy, their electrons move ____.
up to higher energy levels
Light emitted from fireworks is caused from electrons moving (up or down) between energy levels.
down
