Unit 2: Atoms, Electrons and Periodic Table

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

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

Where are metalloids located on the periodic table?

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

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

The element Be is located in what group?

What is the charge of this atom?

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

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

Which 2 elements are isotopes of each other?

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

How many electrons for ³³S^2-?

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 _____.

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

Which principle states that electrons fill the lowest energy first?

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

What element has its final electron located at 4f¹³?

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

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

Krypton has how many valence electrons?

What is the approximate mass of an electron?

What is the shape of a p orbital?

How many neutrons for the following atom?

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

Ernest Rutherford proved the existence of ______________.

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

How many electrons for ⁷Li⁺?