Reactive elements
What is the most reactive element in group 1?
Francium(Fr)
Atomic number = 1
What is the most common food ingredient, salt's chemical symbol?
NaCl is salt's chemical symbol. Na = Sodium(Natrium) and Cl = Chlorine
Why are reactive metals stored in oil?
Reactive metals are stored in oil because they react violently and tarnish in the presence of water.
What is neutralization?
Neutralization is the process by which water and salts are formed when an acid and base come in contact
Which is the least reactive element group 1?
What is the atomic number of Oxygen(O)?
Oxygen's atomic number is 8
Mention any 1 natural acid-base testers which is also used in cooking.
Turmeric
What are group 2 elements also called?
Alkaline earth metals
What color does lithium produce when burnt?
Red
What are the periodic trends of noble gasses(mention any 3)
1. They have a complete valence shell(stable)
2. Most of them are odorless, colorless and tasteless
3.Atoms increase in size down the group
4. The boiling point of these elements increase down the group
What is valency?
The atom's ability to attract and give away electrons is called as valency
Is oxygen a diatomic or a monoatomic molecule?
Diatomic -> O2
Mention any 2 periodic trends of group 1 metals.
1.Group 1 metals are soft metals
2.Group 1 metals tarnish in the presence of water.
Name any 4 acids
Formic acid, HCl acid, H2SO4 acid, Citric acid
What is the state of matter of Iodine?
Iodine is a purple metallic solid.
What is the octate state of an atom?
When the outer-most shell of an atom has 8 electrons it becomes stable and is said to be in it's octate state
Why it adviced to put a base like baking soda on an ant bite?
When an ant stings, it releases formic acid, by adding a base like baking soda, the acid and base neutralize giving relief to the person
Why are group 1 metals called "alkali" metals?
Group 1 metals are called alkali metals because they are basic in nature and have a ph level above 7
What is adhesion and cohesion
Adhesion is the interaction or attraction between two molecules of different substances, while cohesion is the force of attraction between the molecules of the same substance.
Name all the groups 1, 2, 17 and 18 in the periodic table
1 - alkaline metals
2 - alkaline earth metals
3 - Halogens
4 - Noble gasses
What happens to a substances' atoms when it is heated and cooled.
When a substance is heated up, its atoms gain kinetic energy and get exited thus expanding the substance.
When a substance is cooled, then molecules do not gain much energy and the atoms come closer.
Name any 2 natural acid-base indicators.
Turmeric, hibiscus, and litmus
Name all group 1 elements
Lithium(Li)
Sodium(Na)
Potassium(K)
Rubidium(Rb)
Caesium(Cs)
Francium(Fr)
What is meniscus?
Meniscus is the curve of a liquid in a container(caused by surface tension) which is concave when the molecules are attracted to the walls of the container and is concave when the cohesive forces are stronger