8.5C - Periodic Table

Based on the data, which number shows the correct location of the element with 2 valence electrons and 3 energy levels.

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Based on the data, which number shows the correct location of the element with 2 valence electrons and 1 energy levels.

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

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 statement best describes the position of the two elements in the periodic table.

• The two elements are in the same period, with Mg the first element in the period table and Ca the last element

• The two elements are in the same group, with Mg just above Ca

• The two elements are side by side in the same period, with Ca to the left of Mg

• The two elements are in the same group, with Ca just below Mg

Tags

NGSS.MS-PS1-1

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

How many valence electrons are in an element in group 15 in the periodic table?

• 5

• 15

• 7

• 8

Which two atoms are elements in the same group 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

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

• Periods
• Groups