Unit 2: Atoms, Electrons and Periodic Table

What is the approximate mass of an electron?

How many electrons for ⁷Li⁺?

Which principle states that an orbital can only have 2 electrons that have opposite spins?

What element has its final electron located at 4f¹³?

The element Be is located in what group?

Which rule states that electrons within the same energy level to spread out first?

What is the shape of a p orbital?

What happens to electronegativity as you go down the periodic table?

Atoms with the same number of protons, but different number of electrons are called _____.

How many neutrons for the following atom?

What is the charge of this atom?

What is the name of the elements in groups 3-12?

Quantum Theory states that electrons are located in three-dimensional clouds called ______.

Bohr improved the atomic model, saying e- orbit around the nucleus of an atom in rings called _

Which 2 elements are isotopes of each other?

This scientist developed the “plum pudding” model of the atom after discovering the electron.

The size of an atom going right to left on the periodic table generally ___.

What happens when an electron falls from an excited state to the ground state?

How many electrons for ³³S^2-?

Ernest Rutherford proved the existence of ______________.

Which principle states that electrons fill the lowest energy first?

The modern periodic table arranges elements in order of increasing ____ rather than ____.

A fictional element has 2 isotopes with the abundance shown. What is the average atomic mass.

Krypton has how many valence electrons?

Give the name of the element located in the 4th period and 13th group.

What is the short-hand electron configuration for Tin (Sn)?

Because each element has its own quantized energy levels, they can produce unique ___.

Where are metalloids located on the periodic table?