Elements and the Periodic Table

What is an element?

• A substance made of only one type of atom

• A substance made of two or more atoms chemically joined together

• A substance made of two or more elements chemically joined together

• A substance made of one atom

Which symbol represents the element Carbon?

• C

• Ca

• Car

• Cn

Which symbol represents the element Sodium>

• N

• Na

• S

• So

Which of the following elements is the most reactive?

• Potassium

• Lithium

• Sodium

• Helium

Which of the following elements is the least reactive?

• Potassium

• Lithium

• Sodium

• Helium

what part of the atom tells you what element it is?

• Protons

• nuetrons

• electrons

• electron cloud

How do you find how many nuetrons are in an atom?

• subtract the atomic number by the atomic mass

• its the same as the protons

• its the atomic mass

• add the atomic number and the atomic mass

Tags

NGSS.MS-PS1-1

Who created the first periodic table?

• Isaac Newton

• George Washington

• Dmitri Mendeleev

• Ben Franklin

How do you find the amount of valence electrons in an atom?

• they are the same as the atomic mass

• they are the electrons on the outer shell of an atom

• they are on the very first shell of an atom

• they are the same as regular electrons

Tags

NGSS.MS-PS1-1

how many groups are there on the periodic table?

• 10

• 15

• 7

• 18