Metals vs. Nonmetals
Are metals malleable?
yes
what is amu?
Atomic Mass Unit
How many metal elements are there in the periodic table?
95
What are physical properties?
A property of a substance that does not change ether chemical identity of the substance.
What is the number of neutrons in Li: 3p
7amu-3=4n
When you do a pH test for oxide on a nonmetal what will the results be? (explain why)
lower than 7 because they are acidic
what are the type of subatomic particles?
protons, neutrons, and electrons
What are the types of metals in the periodic table?
transitional metals, poor metals, metalloids, alkali metals, and alkaline earth metals
What are chemical properties?
A property of a substance when the substance undergoes a change in composition and a new substance is formed.
What is the number of neutrons in O:8p
16amu-8p=8n
Do nonmetals conduct electricity?
no
What is smaller than an atom?
A subatomic particle
What are the types of elements that are not metal in the periodic table?
Lanthanides, Actinides, Nonmetal, Noble Gases and Halogens
What are isotopes?
Atoms of the same element with different numbers of neutrons.
Isotope Magnesium
12 protons + 12 neutrons = 24 amu; 12 protons + 13 neutrons = 25 amu; the average amu is 24.305, therefore Magnesium-24 is the major isotope.
In the periodic table are there more metal or nonmetal elements?
There are more metals?
What is an ion?
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
What makes up most of an atom's atomic mass?
Protons and neutrons
What does the Bohr Model show?
The numner of electrons an element has.
Isotope: Hydrogen
1 proton + 0 neutrons = 1 amu; 1 proton + 1 neutron = 2 amu. The average amu is 1.00794, so hydrogen-1 is the major isotope.
Who invented the periodic table?
Demitri Mendeleev
Do ions have an unequal number of protons and electrons?
Yes
Where do electrons exist?
orbitals surrounding the nucleus.
Name the groupings in the periodic tabel?
Halogens
Noble Gases
Transitional Metals
Metalloids
Poor Metals
Nonmetals
Alkali metals
Alkali earth metals
Actinides
Lanthanides
Identify the number of protons and neutrons for Fluorine and its atomic number.
9 protons and 10 neutrons = 19 amu