Elements
How are the elements arranged on the modern periodic table?
by increasing atomic number
What are the vertical columns of the periodic table called?
groups
Poor conductors of heat and electricity are called ________________.
nonmetals
Metalloids have properties of both ______________and _________________.
metals and nonmentals
What subatomic particle determines how an element will react?
valence electrons
The number of this subatomic particle determines the identity of an atom.
proton
Nonmetals do not have luster. They are _________.
dull
Metalloids are considered ______________since they conduct heat and electricity but not as well as metals.
semiconductors
Where can you find out how many valence electrons an element has?
in front of the A at the top of each group/family
What are the horizontal rows of the periodic table called and what information does their number tell you?
periods/electron shells
Name an element that is a nonmetal in group 16?
What element is most commonly used to make computer chips due to it's property of being semiconductive?
Silicon
Why do the group one elements react violently with water?
because they only have one valence electron that gets pulled away by water creating hydrogen gas
If Oxygen were to lose two protons, what element would you have?
Carbon
Calcium is a metal that helps make your ___________ strong.
bones
If you hit a solid nonmetal with a hammer it would break. This is because solid nonmetals are _____________.
brittle
Are most of the elements on the periodic table metals, nonmetals or metalloids?
metals
What Russian scientist is credited with developing our current Periodic Table?
Medeleev
Describe the arrangement of atoms that make metals solids at room temperature.
grid like, organized, other various descriptions
How many valence electrons do the elements in the most reactive nonmetal group have?
7
What two subatomic particles are found inside the nucleus?
protons and neutrons