Periodic Table

Which of the following shows the trend that occur when moving down Group I of the Periodic Table?

• The melting point of the elements decrease.

• The number of valence electrons increase.

• The reactivity decreases.

• The relative atomic mass decrease.

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

How many electrons does a Copper atom have?

• 63
• 29
• 92
• 34

Tags

NGSS.MS-PS1-1

In the modern periodic table elements are arranged by:

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

What do the vertical columns on the periodic table tell us?

• The number of electron shells

• The number of valence electrons (electrons on the outer most shell)

What group and period does this element belong in? *

• period 1 and group III

• period 3 and group I

• period II and group 3

• period III and group 2

What can you tell from the following electronic structure?

2,8,7

Please select all the appropriate options.

• It has 7 valence electrons

• It is in Group 7

• It is in Period 3.

• It is in Group VII.

What is formed when sodium reacts with water?

• sodium oxide and hydrogen
• sodium hydroxide and hydrogen
• sodium hydroxide and oxygen
• sodium hydroxide and carbon dioxide

Tags

NGSS.MS-PS1-5

What is the symbol equation for the reaction between sodium hydroxide and water?

• 2Na + 2H₂O → 2NaOH + H₂

• Na + H₂O → NaOH + H

• Na + H₂O → NaCl + CO₂

• 2Na + 2H₂O → 2NaH₂ + O₂

Which of the following is NOT an alkali metal

• Li
• Cl
• K
• Cs