Atomic Basics
This is the smallest part of an element that can still be identified as that element.
What is an atom?
The Greek word atomos, from which we get the word atom, has this meaning.
What is “cannot be divided”?
(or) What is "indivisible"?
This neutral particle is found inside the nucleus.
What is a neutron?
This number represents the number of protons in an atom’s nucleus and identifies the element.
What is the atomic number?
This area outside the nucleus is where electrons are most likely to be found.
What is the electron cloud?
This is the center core of an atom.
What is the nucleus?
This English scientist proposed the Atomic Theory of Matter.
Who is John Dalton?
This positively charged particle is found inside the nucleus.
What is a proton?
The total number of protons and neutrons in an atom is called this in your notes.
What is atomic mass?
The first energy level, which is closest to the nucleus, can hold this many electrons.
What are 2 electrons?
This part of the atom contains electrons.
What is the electron cloud?
According to the Atomic Theory of Matter, Atoms cannot be ___________ or ____________.
What is "created" or "destroyed"?
This negatively charged particle is found outside the nucleus.
What is an electron?
If an atom contains 14 protons and 14 neutrons, this is its atomic mass.
What is 28?
Within the electron cloud, electrons are arranged in these, which are also called orbitals or shells in your notes.
What are energy levels?
More than 2,000 years ago, this Greek philosopher suggested the idea of the atom.
Who is Democritus?
According to the Atomic Theory of Matter, two or more elements can combine to form one of these.
What is a compound?
These two atomic particles have essentially the same mass.
What are protons and neutrons?
An atom of an element with the same number of protons but a different number of neutrons is called this.
What is an isotope?
This energy level, second closest to the nucleus, can hold up to 8 electrons.
What is the second energy level?
John Dalton was an English scientist in this particular field.
What is chemistry?
In this year, John Dalton proposed his Atomic Theory of Matter.
When is 1803?
The mass of one proton.
What is one "atomic mass unit"?
(or) What is one "amu"?
Scientists use this unit, abbreviated amu, to measure the extremely small mass of atoms.
What is an atomic mass unit?
The maximum number of electrons that can fit within the third energy level.
What is 18 electrons?