Savvas Chem

Diagram shows the symbol of neon. Which statements is not true about neon?

• Neon exist as a monatomic elements

• Neon has low melting and boiling point

• Neon has a low density

• Neon reacts with bromine to form a covalent compound

Tags

NGSS.HS-PS1-1

A construction worker wants to weld two pieces of iron together during the construction of a tall building. Which of the following elements, J, L, M or Q, is the most suitable to be used to provide an atmosphere which can prevent the hot iron from reacting with oxygen in the air during welding?

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Which property of Group 18 elements increases when going down the Group in the Periodic Table?

• Forces of attraction

• Reactivity

• Solubility in water

• Electrical conductivity

Argon (proton number =18) is inert to any chemical reaction because

• It is light

• it is located in Group 18

• it has achieved stable duplet electron arrangement

• it has achieved stable octet electron arrangement

Tags

NGSS.HS-PS1-1

Which elements have chemical properties in common?

• elements in a group

• elements in a period

Tags

NGSS.HS-PS1-2

Which two elements have properties in common?

• Nitrogen and Phosphorous

• Oxygen and Nitrogen

• Sulfur and Nitrogen

Tags

NGSS.HS-PS1-1

These elements are in a:

• group

• period

Tags

NGSS.HS-PS1-1

Atom T has a proton number of 11 and a nucleon number of 23. Which of the following is true about element T?

• It does not conduct electricity

• If forms an oxide with the formula TO

• It is a hard black solid

• It reacts with water to form an alkaline solution

Tags

NGSS.HS-PS1-1

Which statements is correct about the alkali metals when going down Group 1 in the Periodic Table?

• The reactivity decreases

• Strength of nucleus to attract an electron into the valence shell increases

• Electropositivity decreases

• The single valence electron becomes more weakly pulled by the nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Metal T is in Group 1 of the Periodic Table of Elements. Which formula represents the oxide of T

• TO

• TO₂

• T₂O

• T₂O₃

Tags

NGSS.HS-PS1-2