My pal, Atom
Negative Nellie
Positively Exciting
Take me back to ELEMENTary school
Leave me out of this, I'm NEUTRAL!
100
What is an atom?
The basic unit of matter.
100
The negative particles in an atom are
What is electrons
100
What are the positively charged particles in the atom called?
Protons
100
Carbon has a mass number of 12 and an atomic number of 6, how many protons does it have?
6 protons.
100
Where are neutrons located?
In the Nucleus
200
This Greek word means unable to be divided
What is atomos
200
This space around the nucleus is where you will find electrons.
What is the electron cloud.
200
Where are protons located?
What is the nucleus
200
What can you find when you add the number of protons and the number of neutrons?
The mass number
200
What charge do neutrons have?
No charge, they are neutral
300
What does the current atomic theory say about the location of electrons?
That they are located in an area around the nucleus called the electron cloud
300
How many electrons fit into the first 3 orbitals of an atom
2 electrons in the first 8 electrons in the second 18 electrons in the third
300
If you know the atomic number of an element, what else do you know?
The number of protons
300
Copper has an atomic number of 29 and a mass number of 64, how many protons, neutrons and electrons does it have?
29 protons 35 neutrons 29 electrons
300
How can you find the number of neutrons in an atom?
Mass #-Atomic #=#of Neutrons
400
This scientist believed that electrons move around the nucleus in circular pathways called orbitals.
Who is Niels Bohr
400
An atom that loses or gains electrons is called ______
What is an Ion
400
What is the mass of a proton?
1u
400
What is the atomic number of a sodium atom that has 11 protons and 12 neutrons?
11
400
This scientist discovered that atoms also contain uncharged particles called neutrons in the nucleus
Who is Chadwick
500
This scientist said that if you cut a material in half enough times, eventually you'd be left with a piece that cannot be divided.
Who is Democritus
500
This scientist found particles in the atom with a negative charge
Who is Thomson
500
This scientist called positively charged particles in the nucleus protons.
Who is Rutherford
500
Lithium has an atomic number of 3 and a mass number of 7, how many electron orbitals does it have?
2, the first contains 2 electrons and the second contains 1 electron.
500
What is an atom called when it gains or loses neutrons?
An Isotope
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