Properties of Metals

Magnesium reacts with oxygen to make

• magnesium oxide / basic in nature

• magnesium oxide / acidic in nature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When sodium reacts with water it produces ___________

• hydrogen

• carbon dioxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When sodium reacts with water it starts floating

• because hydrogen formed sticks to its surface and makes it less dense

• because it is less dense than water

sodium and potassium react vigorously with dilute hydrochloric acid . According to reactivity which metal will produce more bubbles with high temperature

• sodium

• potassium

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-5

What property of metals allows them to be drawn into wires?

• Malleability

• Ductility

• Brittleness

• Opacity

Answer explanation

Metals can be drawn into wires due to their property of ductility, which allows them to be stretched into thin wires without breaking.

Mark the properties shared by metals.​ ​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ ​ (e)  

• luster

• bad conductor of heat

• good conductor of heat

• malleable

• ductile

• bad conductor of electricity

• good conductor of electricity

Elements that have luster, are good conductors of heat and electricity, and are ductile and malleable.

• Metal

• Metalloid

• Non-Metal

Answer explanation

Elements that have luster, are good conductors of heat and electricity, and are ductile and malleable are classified as metals.

If an element is lustrous and malleable, it is most likely to be a _________.

Which of the following is a property of metals?

• High melting point

• Low density

• Poor conductor of heat

• Insoluble in water

Answer explanation

The property of metals that is described as having a high melting point is the correct choice.

What is the primary reason alloys are created instead of using pure metals?

• To decrease the cost

• To improve the appearance

• To enhance the metal's properties

• To increase the weight

Answer explanation

Alloys are created to enhance the metal's properties, such as strength, durability, and corrosion resistance, which are often superior to those of pure metals.