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guajiro [1.7K]
3 years ago
10

Express 68000 kg in scientific notation

Chemistry
1 answer:
JulsSmile [24]3 years ago
7 0
6.8x10^4
Would be the answer in scientific notation
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Vladimir79 [104]

It increases

The attractive force between the nucleus and the electrons INCREASES if the proton number increases while the number of energy levels remains constant.

Explanation:

Remember that protons carry a positive charge while electrons carry a negative charges. Unlike charges attract while like charges repel. An increase in the number of protons increases the positive charge of the atomic nucleus. This means that the force of attraction on the electron cloud of the atom increases.

This is why the atomic radius of atoms decreases across a period (from left to right) as the mass number of the atoms increase (while the number of electron orbitals remains the same across the period).

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6 0
3 years ago
identify the postulate of Dalton's theory that is violated by the following observations: 59.95% of one sample of titanium dioxi
Inga [223]

<u>Answer:</u> This violates the law of constant composition.

<u>Explanation:</u>

Dalton's theory is based on mainly two laws, which are law of conservation of mass and law of constant composition.

Law of constant composition states that a compound always contain the elements in the fixed ratio by their masses.

For Example: In water (H_2O), the hydrogen and oxygen are present in the fixed ratio of 1 : 9 by their mass.

We are given:

A sample of titanium dioxide having 59.95 % of titanium and another sample of titanium dioxide having 60.10 % of titanium.

As, the compound is titanium dioxide. So, the mass percent of titanium must remain the same in both the elements.

Hence, this violates the law of constant composition.

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4 years ago
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vfiekz [6]

I believe the answer is (B) as molten Kevlar when spun into fiber, its polymers have a crystalline arrangement.

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3 years ago
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