electrons
How many valence electrons does sulfur have?
6
Where is most of the mass in an atom?
the nucleus
Most of the elements in the periodic table are
a. gases
b. metals
c. nonmetals
d. jello
b. metals
Name two elements with similar properties to sodium.
any of the following-
hydrogen, lithium, potassium, rubidium, caesium, francium.
Which of these elements is most reactive?
a. hydrogen
b. boron
c. argon
c. argon
How many energy levels does sulfur have?
3
What is an energy level?
What will the atomic number tell us?
a. the numbers of neutrons
b. the number of electrons
b. the number of electrons
What order are the elements in?
a. atomic mass
b. atomic number
b. atomic number
What is special about metalloids?
How many electrons does sulfur have?
16
Which subatomic particle is neutral?
neutrons
a. metal
b. metalloid
c. nonmetal
d. jello
c. nonmetal
What is a noble gas?
A stable gas.
It doesn't react with other elements.
How many metalloids are there?
6
What are the three subatomic particles?
protons, electrons and neutrons.
Which subatomic particle is the smallest?
Electron
What does APE MAN stand for?
atomic number= protons= electrons
Mass-atomic number = neutrons
What does a closed shell of valence electrons mean?
It will not react with other elements.
What is a noble gas and where are they located on the periodic table?
A non reactive group of atoms located on the far right side of the periodic table.
What kind of charge does an electron have?
negative.
What do you need to find the number of neutrons in an atom?
Mass- atomic number.
What is a group?
What is a period?
A group goes up and down and the elements have similar properties.
A period goes across in increasing atomic numbers.
How many protons, neutrons and electrons are in calcium?
protons- 20
electrons- 20
neutrons- 20
What numbers on the periodic table tell us how many valence electrons in an element?
The numbers on the top with A next to them.