Atomic Structure
This subatomic particle has a positive charge.
What is a proton?
This scientist said atoms are indivisible, solid spheres.
Who is John Dalton?
This number determines the order of elements on the modern periodic table.
What is the atomic number?
An atom with 6 protons, 6 neutrons, and 6 electrons.
What is carbon?
The maximum number of electrons the first energy level can hold.
What is 2?
The region of space where electrons are most likely to be found.
What is the electron cloud?
This scientist believed the atom was a positively charged “pudding” with negative electrons
Who is J.J. Thomson?
The vertical columns on the periodic table are called this.
What are groups (or families)?
This element’s Bohr model shows 11 protons, 12 neutrons, and 2 energy levels with 2 and 8 electrons, plus 1 in the third shell.
What is sodium?
The maximum number of electrons the second energy level can hold.
What is 8?
The number of protons in an atom is also called this.
What is the atomic number?
This scientist described the atom as having a dense, positively charged nucleus with electrons around it.
Who is Ernest Rutherford?
The horizontal rows of the periodic table are called this.
What are periods?
An atom with 17 protons, 18 neutrons, and 17 electrons.
What is chlorine?
The number of valence electrons oxygen has.
What is 6?
This particle has no charge and a mass similar to a proton.
What is a neutron?
This scientist suggested that electrons move in fixed energy levels around the nucleus.
Who is Niels Bohr?
Elements on the left side of the periodic table are classified as these.
What are metals?
This element has 2 energy levels with 2 electrons in the first shell and 8 in the second, making it stable.
What is neon?
Atoms are most stable when their outermost energy level has this many electrons.
What is 8 (the octet rule)?
The mass number of an atom is calculated by adding these two subatomic particles.
What are protons and neutrons?
This modern model describes electrons as existing in regions of probability, not fixed paths.
What is the Electron Cloud Model?
Elements in Group 18 are known as these unreactive gases.
What are noble gases?
An atom with 26 protons, 30 neutrons, and 26 electrons.
What is iron?
An atom with 6 valence electrons will gain electrons to have this charge.
What is -2?