The Atom Unit 3-4

Front

What is the name for Protons and Neutrons?

Back

Nucleons

Front

What is the mass of an Electron?

Back

1/1840 u

Front

What two things are common in Isotopes?

Back

Their element, and atomic number (number of Protons)

Front

How many electrons does a Magnesium ion have? (click the periodic table)

Back

10 electrons

Front

State Pauli's Exclusion Principle

Back

There is a maximum of two electrons in each orbital provided they have opposite spin

Front

What is the electron configuration of Silicon? (click the periodic table)

Back

1s² 2s² 2p⁶ 3s² 3p²

Front

How many Valence Electrons does this electron configuration have, 1s²2s²2p⁴?

Back

6 Valence Electrons
(The sum of the outermost energy level's superscript, 2s²2p⁴... 2 + 4 = 6)

Front

Name the 7 Diatomic elements

Back

Hydrogen (H₂), Nitrogen (N₂), Oxygen (O₂), Fluorine (F₂), Chlorine (Cl₂), Bromine (Br₂), and Iodine (I₂)

Front

List 3 Metalloids (click the periodic table)

Back

Front

How does the Atomic Mass affect its Atomic Radius?

Back

Increased atomic radius means smaller atomic radius, due to stronger attractive forces between the nucleons and electrons.