Unit 3 Atoms and Periodic Table Study Guide

Where are the neutrons located?

Inside the nucleus

Who is considered to the be the father of the modern periodic table?

Mendeleev

What elements are found on the left side of the periodic table?

Metal

What is the change of the neutron?

Neutral

What are made up of invert gases that do not combine with other materials?

Noble gases

Where is the proton located?

Nucleus

Where is the electron located?

Outside the nucleus

What 4 pieces of information are found in each box of the periodic table?

Symbol Atomic number Mass number Name

What are negative ions called?

anions

What is unique for any given element?

atomic number

What does the electron cloud model describe?

electrons

What are the fixed distances from the nucleus of an atom where electrons may be found called?

energy levels

As you move from left to right across a period on the periodic table, what happens to the number of valence electrons?

increases by 1

What are atoms that have a positive or negative charge called?

ion

What are atoms of the same element that differ in their numbers of neutrons called?

isotopes

What group on the periodic table are solids, can be polished to look shiny, shape can change and good conductors of heat and electricity?

metals

What is the change of the proton?

+

What is the charge of the electrons?

-

What is the symbol for aluminum?

Al

How is the periodic table arranged?

Atomic Number

What are the building blocks of matter?

Atoms

What does the atomic number represent?

protons

In a neutral atom, what particles are equal?

protons and electrons

What does the mass number represent?

protons and neutrons

What are the electrons in the outermost energy level called?

valence electrons