Location Period Group

Which pair of properties describe the elements in group 18

• They have 8 valence electrons and are very reactive

• They have 8 energy levels and are stable

• They are gases at room temperature and are stable

• They are gases at room temperature and very reactive.

Which of these elements is in this group?

• Lithium

• Silicon

• Aluminum

• Strontium

Which two elements on the periodic table are in the same group?

• Na and He

• O and C

• Li and Ne

• He and Ar

Which pair of properties describes the elements in Group 1?

• They are chemically stable

• They have 8 valence electrons

• They are the most reactive metals

• They are the most reactive non metals

Which two atoms are elements that belong in period two in the periodic table?

• Atom 3 and Atom 4

• Atom 1 and Atom 4

• Atom 3 and Atom 2

• Atom 1 and Atom 2

Tags

NGSS.MS-PS1-1

Based on the data, which number shows the correct location of the element that is brittle and dull.

• 1

• 2

• 3

• 4

Based on the data, which number shows the correct location of the element that is malleable and a good conductor.

• 1

• 2

• 3

• 4

The model of the periodic table in the illustration shows the location of four elements. A student is asked to identify an element that is a pale yellow brittle solid that does not conduct electricity. At which location in this periodic table would the element most likely be found?

• 1

• 2

• 3

• 4

Answer explanation

"Nonmetals on the right"

A student is studying the ways different elements are similar to one another. The illustration contains diagrams of atoms from four different elements. Which two atoms are of elements in the same group in the periodic table?

• Atom 1 and Atom 2

• Atom 1 and Atom 4

• Atom 2 and Atom 3

• Atom 3 and Atom 4

Answer explanation

Elements in the same group (column) have the same number of valence electrons!!!

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the illustration. Which of these elements is in this group?

• Lithium

• Strontium

• Aluminum

• Silicon

Answer explanation

Elements with two valence electrons are found in Group 2 or 2A.