Periodic Table

How many of each atom are in the compound above?

• 1 magnesium atom, 2 iron atoms, and 4 oxygen atoms

• 3 magnesium atoms, 2 iron atoms, and 4 oxygen atoms

• 6 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

• 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

Tags

NGSS.MS-PS1-1

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element’s-

• Mass and atomic weight.

• The number of stable isotopes.

• Identity

• State of matter

Which statement would be most helpful in identifying an element?

• The element has 36 protons

• The element has 6 neutrons

• The element has 8 valence electrons

• The element has properties similar to nitrogen

Which statement would be most helpful in determining an element’s reactivity?

• The element has the same number of electron shells as iodine

• The element has the same number of valence electrons as cesium

• The element has 47 neutrons

• The element is a metal

Two students debate the number of valence electrons in an atom of sulfur. Which tool would be most helpful in obtaining this information.

• Scale

• Periodic table

• Microscope

• Dichotomous key

Which of the following characteristics is similar for fluorine and iodine?

• Number of Protons

• Number of Neutrons

• Number of Orbitals

• Number of Valence Electrons

The valence electrons model shown is used by middle school students to help master the concept of determining the number of valence electrons for an element. Each student is provided with a different element card and bingo chips to map the electron configuration of an element. Where are valence electrons located on the model?

• Near the nucleus

• In the middle of the atom

• At the innermost level

• At the outermost level

Tags

NGSS.MS-PS1-1

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

• Element 1 has the same atomic mass as Element 4

• Element 3 has a very similar chemical properties as Element 4

• Element 1 has very similar chemical properties as Element 3

• None of the above

Tags

NGSS.MS-PS1-1

Each column in the periodic table is called a 

• period

• group

• cluster

• unit

How many protons are in this element?

• 79

• 196

• 117

• Cannot be determined

Tags

NGSS.MS-PS1-1