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Degger [83]
3 years ago
5

Help I need this lol!!!!!

Chemistry
1 answer:
brilliants [131]3 years ago
4 0

Answer:

green

Explanation:

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The Second Law of Thermodynamics makes it difficult for scientists to explain how the original universe became ordered.
ladessa [460]

Answer:

True :)

Explanation:

8 0
2 years ago
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Webb has calculated the percent composition of a compound. How can he check his result?
goldenfox [79]

by making sure they are in the lowest ratio. by adding them to see if they total 100. by checking that they are whole-number multiples. by dividing them by the molar mass.

7 0
2 years ago
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Rank the following atoms in order of decreasing first ionization energies (i.e., highest to lowest): Li, Be, Ba, F.
Minchanka [31]

Answer:

The order is:

F >Be >Li >Ba

Explanation:

Electrons are held in atoms by their  attraction to the nucleus which means that to remove an electron from the atom energy is needed.

The ionization energy is the minimum energy necessary to remove an electron from an atom in the gas phase and ground state, the electron removed being the outermost, that is, the furthest from the nucleus. The further away the electron is from the nucleus, the easier it is to remove it, that is, the less energy is needed.

By increasing the atomic number of the elements of the same group, the nuclear attraction on the outermost electron decreases, since the atomic radius increases. Then the ionization energy decreases. In other words, in a group it decreases from top to bottom because the size of the atom increases and it is easier to remove an external electron.

By increasing the atomic number of the elements of the same period, the nuclear attraction on the outermost electron increases, since the atomic radius decreases. Therefore, in a period, as the atomic number increases, the ionization energy increases. In summary, in a period it increases from left to right as the effective nuclear charge increases and it increases thanks to the decrease in the size of the atom.

Taking these considerations into account, the order is:

<u><em>F >Be >Li >Ba</em></u>

5 0
2 years ago
A particle that orbits the nucleus in an atom is called a(n
Morgarella [4.7K]
Particles that orbit the nucleus are called electrons.

Explanation: Electrons are negatively charged particles arranged in orbits  around the nucleus of an atom and determining all of the atom's physical and chemical properties  except mass and radioactivity.
7 0
3 years ago
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It is possible for a substance to exist in all forms of matter give an example
bazaltina [42]
Yes: water can exist in solid (ice), liquid (water), and gas (water vapor) forms.
4 0
3 years ago
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