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Blizzard [7]
2 years ago
5

A group of students working in a high school chemistry lab believe they have discovered a new element! How exciting! Upon furthe

r testing by scientists (with better equipment), it is found that the new element contains 74 protons and 110 neutrons. Use Page 495 and the Periodic Table (Pages 500-501) to answer the following questions about this new element.
1. What is the atomic number of this element? _____________¬¬___________

2. What is the mass number of this element? _________________________

3. Is this really a new element? Explain your reasoning.


4. Give the name and symbol for this element.___________________________________

5. When the students discovered it, did they find a solid, a liquid, or a gas? Explain your reasoning.
Chemistry
2 answers:
mart [117]2 years ago
4 0

Answer:

1) The atomic number of this element is 74, because number of protons = atomic number

2) Mass number of this element is 184

Ar=Z+N=74+110=184

3) It isn't a new element. An element with such atomic and mass numbers exists

4) It is Wolfram. Symbol: W

5) Solid

Sorry if I made mistakes. I started learning English recently.

kipiarov [429]2 years ago
3 0

Answer:

Explanation:

We are given that  number of protons in  new element =74

Number of neutrons in new element =110

We know that

1.Atomic number = Total number of protons

Atomic number of new element =74

Mass number = Number of protons+number of neutrons

2.Mass number of new element =74+110=184

3.It is not new element .It had already exits in periodic table.

4.Hence, the new elements is tungsten or wolfram.

Symbol of tungsten is W.

5.It is a metal and all metals except mercury are solids.Therefore, tungsten is a solid.

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