GROUP 1: ALKALI METAL

Presentation

•

Chemistry

•

10th Grade

•

Practice Problem

•

Medium

Sharidah Nadhirah

Used 27+ times

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13 Slides • 10 Questions

GROUP 1: ALKALI METAL

12.2

ONLY lithium, sodium, and potassium ae safe to keep in school lab

PROPERTIES OF GROUP 1

1. PHYSICAL : They can be observed without changing the identity of the substances; see, smell, feel, look

2. CHEMICAL : They can only be observed by changing the identity of substances

PHYSICAL PROPERTIES

colour
shapes
siZe
density
amount volume

GROUP 1 PHYSICAL PROPERTIES

good conductors of heat & electricity
soft
lighter = low density=float on water
low melting points
low boiling points
*the pattern of above properties increases going down the group

CHEMICAL PROPERTIES

falammability
rusting
burning
corrosion
reactivity

#1 CHEMICAL PROPERTIES:

REACTION WITH H₂O

React vigorously with water. Hydrogen bubbles off, leaving solutions of their hydroxides which are alkali

What you can see?

How can you represent the chemical reaction?

#2 CHEMICAL PROPERTIES:

REACTION WITH Cl₂

Plunge into flames and burn brightly

#3 CHEMICAL PROPERTIES:

REACTION WITH O₂

Burns fiercely to form oxides, dissolves in water to give alkaline solution

Why they react in similar way and giving similar patterns?

clue: valency (outer-shell)

drawing time!!

Multiple Choice

What is another name for Group 1 elements?

metals

alkali metals

Multiple Choice

Which best describes group 1 metal?

soft

hard

Multiple Choice

Which of the following is not a group 1 metal?

Multiple Choice

Which best describes group 1 metal?

unreactive

reactive

Multiple Choice

Which of the following is an exampl of physical prperties?

soft

very reactive

Multiple Select

Which of the following is not a physical properties?

density

fizzes

density

Multiple Choice

Which element in group 1 is the lightest metal?

Multiple Choice

lithium hydroxide is formed when it reacted with?

water

chlorine

oxygen

Multiple Choice

lithium chloride is form when it reacts with?

water

chlorine

oxygen

Multiple Choice

lithium oxide is formed when it reacts with?

oxygen

carbon dioxide

water

GROUP 1: ALKALI METAL

12.2

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