Chapter 5 Flashcards
An example of a metal element is
aluminum
An example of a nonmetal is
carbon
The lightest elements are found at the _______ of the periodic table.
top
Most elements are __________
solid, metal
Which element would not have three valence electrons? boron krypton gallium thallium
krypton
The symbol for the element iron is __________
Fe
As you move down the periodic table, ___________
energy levels increase
Metal elements could be described as ____________
shiny, hard and good conductors of heat & electricity
An atom of oxygen has __________ electrons in the second energy level.
6
Draw an electron dot diagram for oxygen
should draw an O with 2 dots on top, 2 dots on one side, 1 dot on the bottom and 1 dot on the other side
Oxygen is in Group _________ and Period ________
Group 16; Period 2
Oxygen will combine with _________ atom(s) of hydrogen to form a water molecule.
2
Another element in the same chemical family as oxygen is ______________
any element in Group 16
The element aluminum has _________ electron(s) in the first energy level, _____________ electron(s) in the second energy level, _________ electrons(s) in the third energy level and _________ electron(s) in the fourth energy level.
2
8
3
0
The _________ is a chart that arranges elements having similar properties into the same group.
periodic table
An electron in the outermost energy level is a ________ electron
valence
The repulsion force between protons in the nucleus is overcome by the _____________
strong force
Valence electrons are represented by dots in __________ diagrams.
electron dot
The electrostatic charge of the nucleus is ________
positive
Of the following two words, which is the one that causes the other:
properties
structures
structures
electrons have a _________ electrostatic charge
negative
electrons are located _____________
in energy levels surrounding the nucleus
protons have a __________ electrostatic charge
positive
protons are located ______________
in the nucleus
neutrons have a ___________ electrostatic charge
neutral
neutrons are located __________
in the nucleus
Be able to identify, using a periodic table of elements, the atomic number, atomic mass, # of protons, # of neutrons and # of electrons for the following elements:
lithium
sodium
tin
be able to use the periodic table and locate information for the elements on the table; you do NOT need to memorize the elements on the periodic table.
