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ipn [44]
3 years ago
8

Gravity on Earth is 9.8 m/s2, and gravity on the Moon is 1.6 m/s2.

Chemistry
1 answer:
Margaret [11]3 years ago
7 0

Answer: Mass is 40 kg, weight is 64 N

Explanation: Mass is same everywhere, weight G = mg, it depends on acceleration of gravity

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How many electrons would Boron with a +2 charge have?
irina [24]

5 electrons

Boron atomic number 5 has five electrons in its ground state.

Commonly Boron will lose 3 electrons leaving 2 electrons in its most common ionic form.

Explanation:

The atomic number gives the number of protons. Protons which have a positive charge are balanced by an equal number of electrons in a neutral atom.

Boron number 5 has five protons and therefore as a neutral atom also has five electrons.

Boron has an electron configuration of

1s22s22p1

The most stable electron configuration for Boron is

1s2

+ 3 charges. By losing three electrons Boron can achieve the stable electron structure of Helium

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Large crystals are formed when rocks cool very slowly. This gives time for crystallization nuclei to form and other crystals aggregates round it.

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