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agasfer [191]
3 years ago
13

Which of the following are examples of matter?a. heat b. sunlight c. water d. grass e. air

Chemistry
1 answer:
OverLord2011 [107]3 years ago
7 0
Sunlight? air? i’m not sure they could all be matter..
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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.

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Stells [14]

Answer:

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Nuclear fusion -

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It is D.chronoshpere 
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because the voidness of the air can trigger a catastrophic disaster for the galaxy

Explanation:

than you so much

good luck

5 0
3 years ago
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