The answer is
option D "CO." Co also known as
Cobalt is the 27th element on the periotic table. It was discovered in <span>1735, it's boiling point is 3200 k.</span>
Atomic mass: 58.9332
Protons: 27
Neutrons: 32
Electrons: 27
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Chlorine<span> is in group 17 of periodic table, also called the halogens, and is not found as the element in nature only as a compound.
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Answer:
It shows no regular pattern
Explanation:
Physical properties of an element are those we can observe and feel with our senses. Also, the use special equipment can enhance our perception of these properties.
- The same physical property can be shared different number elements.
- On the periodic table, all the elements in group 1 and 2 are metals.
- This is not very useful for scientists whose emphasis is to distinguish one atom from the other.
- Therefore, physical properties are highly limited in the organization of the periodic table.
Answer:
The 4th option
a possible explanation of or answer to a scientific question
Explanation:
