1. Atomic Structure Flashcards
Atoms are mostly- (1)
empty space surrounding a very small dense nucleus.
Where are protons, neutrons and electrons found? (1)
Protons and Neutrons are found in the nucleus of the atom.
Electrons are found in the electron shells surrounding the nucleus.
What are the relative masses of protons, neutrons and electrons? (3)
Protons - 1
Neutrons - 1
Electrons - 1/1836
What is the atomic number? (1)
What is the atomic number?
What is the nucleon (mass) number? (1)
The number of protons and neutrons in the nucleus of the atom.
What is atomic radius? (1)
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.
Atomic Radius periodic table trends? (2)
Increase right to left
What is ionic radius? (1)
The ionic radius is the distance between the nucleus and the electron in the outermost shell of an ion. (This distance varies as electrons are gained/lost)
Ionic radius trend along period and down groups? (1)
Increase right to left
What are isotopes? (1)
Isotopes are atoms that have the same amount of protons but different number of neutrons.
Why do isotopes of a particular element have the same chemical properties? (1)
They have the same number of electrons
Why do isotopes of the same element have different physical properties? (1)
Due to having more/less neutrons the isotopes have different masses and densities.
