Periodic Table

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion

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NGSS.HS-PS1-1

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

The chart gives the atomic number and mass number of two elements.

How many protons does Element B have?

• 10

• 20

• 9

• 19

Tags

NGSS.MS-PS1-1

Below is a square that represents one element of the periodic table.

What information is in this square of the periodic table, from top to bottom?

• average atomic mass, chemical symbol, chemical name, atomic number

• atomic number, chemical symbol, chemical name, average atomic mass

• average atomic mass, chemical symbol, chemical name, proton number

• atomic number, chemical symbol, chemical name, proton number

Which of the following represents an element?

• H₂O

• HCl

• NaCl

• Au

• CaCO₃

The image below shows how information about a specific element is represented on the periodic table.

What information does the symbol “6” give about the element?

• atomic number

• atomic mass

• density

• chemical symbol

Tags

NGSS.MS-PS1-1

What is the atomic number for Xenon?

• Xe

• 54

• 131.293

• 18

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NGSS.HS-PS1-1

What is the atomic mass of Beryllium?

• 4

• Be

• 9.01

• alkaline earth metal

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NGSS.MS-PS1-1

Use a periodic table: Which of these elements is in the Noble Gas family?

• hyrdogen

• magnesium

• oxygen

• neon

Which part of an atom has a positive charge?

• Proton

• Neutron

• Electron

Tags

NGSS.MS-PS1-1