1ST PART (PG 72 - 74) Excluding Activity Flashcards
What are noble gasses? State all of them as examples.
Noble or inert gasses are gases, which are non reactive to any of the elements present. Their examples are: helium, Argon, Neon, Radon, Xenon, and Krypton.
What are non metals? What are they used for? Give 5 examples.
Non metals are elements, which of them mostly help us in survival. their applications are: like oxygen helps all the living organisms survive through breathing, carbon dioxide is needed by plants to conduct photosynthesis, and nitrogen forms form 78% of the air in free state and also creates a food nutrient vital to humans known as proteins. Their examples are: oxygen, carbon, nitrogen, Sulphur, and hydrogen.
As we have learnt that seawater is a major source of metals, can you name the metals it has in the form of salts.
Magnesium, Potassium, Calcium, and Sodium.
The most abundant metalloid in Earth’s crust is _____________.
Silicon
The most abundant metal in Earth’s crust is _________________.
Aluminum
Which metals are found in free state because they are not reactive?
Gold and platinum.
The most abundant non metal in Earth’s crust is __________.
Oxygen
What are metals? What are they used for? Give 5 examples.
Metals are elements, they are lustrous,, they are strong, they are sonorous, and they can form alloys. They’re mostly used for making utensils, weapons, ornaments, and machines. the five examples are: gold, silver, platinum, aluminum, and iron.
Name all the non metals:
(Formula - Hannah only needs calcium fiber’s chocolate brownie in seven packets ASAP)
Hydrogen, Oxygen, nitrogen, carbon, fluorine, chlorine, bromine, iodine, sulfur, phosphorus, astatine.
Which is the second most abundant metal in earth’s crust?
Iron
The most abundant element in the Earth’s crust. Mention its type.
Oxygen - Non Metal
Nitrogen forms ______% of air in ________ state.
a) 78%
b) Free
Which metals are found in free state due to their low reactivity.
Mercury, Silver and Copper.
Non metals are very ___________ as compared to metals.
Less
The second most abundant element in the Earth’s crust. Mention its type.
Silicon - Metalloid
What are metalloids? State 3 examples.
Metalloids are elements, which have some properties of metals and some of non metals. it’s examples are silicon for germanium, and antimony.
In atmosphere, non metals occur both in free state as ___________, and _________ moreover, in combined state as _________, and ____________.
a) Oxygen, and nitrogen
b) Carbon Dioxide, and water
Which is the second most abundant non metal in earth’s crust?
Nitrogen
Which metal was the first metal to be discovered by mankind?
Copper
As we know that there are millions of substances in this world but they all are made up of a limited number of _____________.
Elements
Non metals occur in earth’s crust in a ___________ state as ______________, _______________, ______________, and _____________.
a) Combined
b) Oxides, Carbonates, Sulphates, and Nitrates
The third most abundant element in the Earth’s crust. Mention its type.
Aluminum - Metal
