Properties of Atoms and the Periodic Table

Question #1: The vertical columns on the periodic table are called

• periods

• groups

• atomic number

• elements

Question #2: The horizontal rows on the periodic table are called

• periods
• groups
• families
• elements

Most elements on the periodic table are

• non-metals
• halogens
• metals
• noble gases

Question # 18b: The periodic table is organized by increasing __________.

• atomic number
• atomic mass
• chemical symbol
• neutrons

Who was the first period to organize the elements into a periodic table?

• Henry G Moseley

• Dmitri Mendeleeve

How did Moseley arrange the periodic table?

• by the atomic mass

• by the atomic number

• by the atomic size

• he placed things randomly in boxes.

Magnesium has 12 electrons. In how many energy levels are the electrons of magnesium?

• 1 energy leve

• 2 energy levels

• 3 energy levels

• 4 energy levels

What is an electron dot diagram?

• symbol of element with dots representing the electrons in the outer shell

• vertical column of elements on the periodic table

• row of elements on periodic table

• arrangement of the elements by increasing atomic numbers

The atomic number tells you what?

• number of quarks

• number of protons

• number of neutrons

• both neutrons minus the protons in an atom.

A proton is....

• A negatively charged subatomic particle
• A positively charged subatomic particle
• A neutrally charged subatomic particle
• The only subatomic particle located in the nucleus