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stiks02 [169]
3 years ago
9

How many meters do you cover in a 10-kilometer (10-K) race?

Chemistry
2 answers:
attashe74 [19]3 years ago
3 0

Answer:

100

Explanation:

d1i1m1o1n [39]3 years ago
3 0

Answer:

10,000 Meters

Explanation:

1 Kilometer is 1,000 meters, so 10 times that is 10,000 meters.

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A student drew a diagram of the quantum model of an atom, as shown. A small circle is shown. Six light gray spheres and six dark
Rufina [12.5K]

Answer:

The diagram is incorrect because there is only a single type of particle at the center of the atom.

Explanation:

The small circle at the centre of the sphere which contains six light gray spheres and six dark gray spheres represents the nucleus of the atom which is found at the centre of the atom.

The nucleus contains only one type of particle which is the proton. Hence the representation of two particles at the centre of the circle makes the model incorrect.

8 0
3 years ago
Logan is cooking, and he wants to increase the boiling point of the water. Which solute would not be a good choice as it would n
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4 0
3 years ago
Read 2 more answers
Which is a chemical property of iron
Artemon [7]

Answer:

The answer you have selected in the screenshot is correct.

Its tendency to react with oxygen is correct.

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7 0
2 years ago
Explain specifically how an electron gives off light in an atom.
exis [7]

Answer:

Then, at some point, these higher energy electrons give up their "extra" energy in the form of a photon of light, and fall back down to their original energy level.

Explanation:

When properly stimulated, electrons in these materials move from a lower level of energy up to a higher level of energy and occupy a different orbital.

3 0
2 years ago
Which of the following scientists made an important contribution to quantum mechanics: (i) Bohr (ii) deBroglie (iii) Heisenberg
grandymaker [24]

Answer:

(i) Bohr; (ii) de Broglie; (iii) Heisenberg (v) Schrödinger

Explanation:

(i) Niels Bohr — 1913 — proposed that electrons travel in fixed orbits with <em>quantized energy levels</em> and that they jump from one energy level to another by absorbing or emitting quanta of light.

(ii) <em>Louis de Broglie</em> — 1924 — proposed the wave nature of electrons and suggested that all matter behaves as both waves and particles (<em>wave-particle duality</em>).

(iii) Werner Heisenberg — 1927 — formulated quantum mechanics in terms of matrices and proposed his famous <em>uncertainty principle</em>.

(v) Erwin Schrödinger — 1926 — applied wave mechanics to the electron in a hydrogen atom, showing that electrons exist in <em>orbitals </em>rather that orbits.

(iv) <em>Ernest Rutherford</em> — 1911 — proposed that atoms have most of their mass in a central nucleus (<em>nuclear atom</em>). Quantum mechanics had not yet been invented.

4 0
3 years ago
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