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3 years ago

The nucleus of an atom is ___.

Chemistry

1 answer:

ira [324]3 years ago

4 0

The nucleus of an atom is made out of protons and newtons.

hope this helps!

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1. Write a brief account of Ernest Rutherford’s personal and professional life in no more than 150 words.

miv72 [106K]

Ernest Rutherford was a famous British physicist who lived and worked in the 19th and the first half of the 20th century. He is now considered to be the father of nuclear physics, given that he was the one responsible for figuring out about the nuclear structure of an atom (proton, electron, neutron) and about the nuclear processes in general. The element rutherfordium (Rf) is named after this scientist. When it comes to his personal life, his parents are both British, however, Ernest was born in New Zealand because his mom and dad before he was born. He worked as a professor in several universities, and was even knighted in 1914. He is a Nobel prize winner, which he won for Chemistry in 1908.

8 0

3 years ago

7 Which phrase describes the molecular structure and properties of two solid forms of carbon, diamond and graphite?(1) the same

kirza4 [7]

2) is the answer. graphite and diamonds possess the same molecular structes however the bonds and structures of diamonds are considerably stronger and more tightly packed respectively

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2 years ago

What is 165 lb in kilograms (kg)? 1 kg = 2.20 lb (please show work) ASAP

Slav-nsk [51]

165 Pounds (lbs) = 74.84 Kilograms (kg)
1 lbs = 0.453592 kg 1 kg = 2.204623 lbs

5 0

3 years ago

To achieve an octet of valence electrons, a cesium atom will become an ion with what charge?

lesantik [10]

The answer is +1 because it gives up it's electron and becomes positive:)

8 0

2 years ago

What is the oxidation state, d electron count, and coordination number respectively of the cobalt ion in [CoBr(NH3)4]PO4? What i

Law Incorporation [45]

Answer:

The correct option is: +4, 5, and 5

Explanation:

A coordination complex consists of a central metal atom or ion bonded to ligands by coordinate covalent bonds. The ligands and the central metal together form the coordination sphere.

[CoBr(NH₃)₄]PO₄

Central metal atom - Co

Coordination sphere consists of 1 Br⁻ and 4 NH₃ ligands

Therefore, the coordination number= 5

Let the oxidation state of Co = x

Oxidation state of Br⁻ ligand = (-1)

Oxidation state of NH₃ ligand = 0

Oxidation state of PO₄³⁻ ligand = -3

∴ x + (-1) × 1 + 0 × 4 + (-3) × 1 = 0

⇒ x = +4

Oxidation state of Co = +4

Electron configuration of Co in ground state: [Ar] 3d⁷ 4s²

Electron configuration of Co in +4 oxidation state: [Ar] 3d⁵ 4s⁰

Therefore, the number of d electrons in cobalt ion = 5

3 0

3 years ago

The nucleus of an atom is ___.​

The nucleus of an atom is ___.