its atomic weight
its atomic formula
its atomic structure
Answer: Option (b) is the correct answer.
Explanation:
Atomic weight is also known as atomic mass or molar mass of an atom.
Atomic mass means the sum of total number of protons and neutrons present in an atom.
For example, atomic mass of HCl is atomic mass of hydrogen + atomic mass of chlorine.
That is, atomic mass of HCl is 1.01 g/mol + 35.453 g/mol = 36.463 g/mol
Thus, we can conclude that molar mass of any element is always equal to its atomic weight.
Answer:
False
Explanation:
Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.
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Answer: False
Explanation:
That’s not using mechanics
B. arsenic (As)
C. bromine (Br)
D. calcium (Ca)
Answer:
A. Potassium (K)
Explanation:
The trend of atomic radius goes:
As group number increases, radius decreases
As period number increases, radius increases
Answer:
francium
Explanation:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
Answer: radioactive isotopes may be used to Trace complex chemical processes.
Radioactive isotopes can be used to study complex chemical processes, such as determining the age of ancient artifacts using carbon dating.
Radioactive isotopes can be used to study complex chemical processes. This is because some isotopes emit radiation that can be detected and measured, allowing scientists to track the movement and transformations of chemicals in a reaction. For example, carbon-14 is a radioactive isotope that can be used to determine the age of ancient artifacts through a process called carbon dating. By measuring the amount of carbon-14 remaining in an object, scientists can calculate how long it has been since the carbon-14 was last replenished.
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physical properties
atomic weight
density
Answer:
atomic weight
Explanation:
Mendeleev realised that the physical and chemical properties of elements were related to their atomic weight
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-solid sulfur
-solid calcium
-gold
Answer: Option (a) is the correct answer.
Explanation:
Amorphous means without any crystalline structure or definite shape. Whereas a solid whose atoms are not bonded together in a definite lattice pattern. This solid is non-crystalline in nature.
For example, glass, gel, plastic etc are all amorphous solids.
Whereas solid sulfur, solid calcium, and gold have a definite lattice pattern and has a crystalline structure. Thus, they are not amorphous solids.
Thus, we can conclude that out of the given options glass is most likely to be amorphous.