Subatomic Particles
These two subatomic particles are contained in the nucleus of the atom
Protons and neutrons
What is the atomic number of Pb?
82
What are valence electrons?
The electrons in the outermost shell.
This is the word for a substance that cannot be broken down into simpler substances.
Element
This bond occurs when valence electrons are shared
covalent bond
This subatomic particle is NOT found in the nucleus of an atom
Electron
What is the atomic mass (rounded) of Rn?
222
How many valence electrons are there in Beryllium (Be)?
2
This is the weighted average of the masses of the isotopes of an element.
Atomic mass
This bond occurs when a metal forms with a nonmetal
Ionic bond
The Atomic Number is the same as the number of which subatomic particle?
Protons
How many protons does Silicon have?
14
How many shells does Argon have?
3
The word "atom" comes from the Greek work "atomos" which means this
Indivisible
This bond occurs when a non-metal bonds to a non-metal
Covalent bond
This subatomic particle has (almost) the same mass as protons
Neutrons
How many electrons does Fe have?
26
Locate the element in Period 5, Column 1. How many valence electrons does it have?
Rubidium- 1 valence electron
This chemist proposed that atoms are configured like a solar system, with electrons orbiting around the nuvleus in specific paths.
Niels Bohr
These tend to lose electrons in chemical reactions, forming positive ions
Metals
The mass number of an atom is the same as its number of what?
Protons and neutrons
How many neutrons does W have?
110 (184-74)
Why are the valence electrons the most important electrons?
They are the electrons that bond and react with other atoms
This is the term for an atom with the same number of protons but different numbers of neutrons.
Isotope
This bond occurs when valence electrons are transferred from one atom to another, often a metal to a nonmetal, and positive and negative ions are formed.
Ionic bond