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e-lub [12.9K]
2 years ago
6

Henri Becquerel and the Curies are famous for discovering that the atom is not indivisible, a belief held since the time of the

Greek philosophers.
True
False
Chemistry
2 answers:
Sphinxa [80]2 years ago
7 0

Answer:

The statement "Henri Becquerel and the Curies are famous for discovering that the atom is not indivisible, a belief held since the time of the Greek philosophers." is <u>true</u>.

Explanation:

Henri Becquerel, Pierre and Marie Curie were three French physicists that in the year 1903 received the Nobel Prize of Physics due to their research and discoveries regarding radioactivity. Becquerel was the first person to discovered, in the year 1896 that atoms were neither indivisible nor mutable, discovery that challenged the previously constituted ideas on atomic structure. Pierre and Marie Curie were the first two people in working with radioactivity and discovering the atomic elements radium and polonium during a research in 1898. All of these physicists worked around the same time with radioactivity and researching the atomic theory, giving new perspectives to the subject.

Rainbow [258]2 years ago
3 0
Henri Becquerel discovered radioactivity and it was the Curies who made experiments about the concept and became known for their d
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Answer:

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Explanation:

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2 years ago
A single electron configuration can represent multiple atoms. The one below represents the following atoms with different charge
valentinak56 [21]

Answer:

To have the electronic configuration equal to 1s²2s²2p⁶3s²3p⁶4s²3d⁷, the chemical element must have an electrical charge equal to 27, that is, it must have 27 electrons, such as Cobalt (Co), for example.

Explanation:

The electronic configuration shown in the question above is known as the Linus Pauling distribution and represents the energy sub-levels that an electrically charged atom can have in relation to the amount of electrons it has.

The layers sub-levels are presented in the following order 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹º 4p⁶ 5s² 4d¹º 5p⁶ 6s² 4f14 5d¹º 6p⁶ 7s² 5f14 6d¹º 7p⁶. Where the small numbers represent the number of electrons in each sub-level and the large numbers represent the layers of electronic distribution.

Accordingly, we can see that an atom that has the configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁷ has 27 electrons, like Cobalt.

6 0
2 years ago
14.2 grams of Na2SO4 is dissolved in water to make a 2.50 L
Trava [24]

Answer:

0.04 M

Explanation:

Given data:

Mass of Na₂SO₄= 14.2 g

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Molarity of solution = ?

Solution:

Number of moles of Na₂SO₄:

Number of moles = mass/ molar mass

Number of moles = 14.2 g/ 142.04 g/mol

Number of moles = 0.1 mol

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Molarity = number of moles of solute / volume of solution in L

Molarity = 0.1 mol / 2.50 L

Molarity = 0.04 M

6 0
3 years ago
Ta, Os, Th are from metal?
Alex787 [66]

Answer:

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6 0
2 years ago
A student reads the label on the bottle of salad dressing shown below.
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The best option is a. but it is not complete!

Both liquids have different densities, it's true. But they are immiscible liquids and they don't form a solution.
6 0
2 years ago
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