Periodic Table, Bohr Diagrams, Valence Review

What is the symbol for Hydrogen

H

What is the symbol for helium

He

What is te symbol for Lithium

Li

What is the symbol for Beryillium

Be

What is te symbol for Boron

B

What is the symbol for Sodium

Na

What is the symbol for Magnesium

Mg

What is the symbol for Aluminum

Al

What is the symbol for Silicon

Si

What is the symbol for phosphorus

P

How to find the amount of valence electrons

The left over atoms on the last outer shell.

What is the quantity and amount of atoms in this molecular formula? 2 (NH4)2CO3

4 atoms of nitrogen, 16 atoms of hydrogen, 2 atoms of carbon, 6 atoms of oxygen.

What are the three classes of Elements?

Metals, Non-Metals, and Metalloids

What is a Group?

A vertical column of elements in the periodic table.

What is a period?

A Period is a horizontal row of elements in the periodic table.

The 1st electron shell can have how many electrons. 

The 1st electron shell can have 2 electrons. 

All matter are made of tiny particles called what?

Atoms

What is the center part of an atom called?

The nucleus

Are electrons larger or smaller than protons and neutrons? 

Electrons are larger.

What does the Atomic Number tell us?

The atomic number tells us how many protons or electrons an atom has.

The mass number minus the atomic number gives the number of…

Neutrons

If elements are in the same group what do they have in common?

They have the same amount of valence electrons.

What happens when a valence electron is far from the nucleus?

The father the valence electron, the easier for it to be lost, making the atom more reactive.

What are group 1 and 17 have in common?

They are both very reactive because they only need to gain or lose one electron to become stable

What do you notice about the valence electrons when you move across a period left to right?

The valence electrons increases by one.

What is the outermost level of electrons called?

Valence

Why is Valence important?

It is important because it determines how reactive an element will be. 

What do you know about the number of electrons when moving down a group/coloumn?

The number of electrons increases by a pattern.

What do you notice about the valence electrons when moving down a group?

It is the same amount of valence electrons. It increases by one when going left to right.

A nucleus have an overall balanced or unbalanced charge?

A balanced charge. 

What is group 1 on the periodic Table called?

Alkali Metals

What is Group 2 on the periodic table called?

Alkali Earth Metals

What is group 17 called?

Halogens

What is group 18 called on the periodic Table?

Noble Gases