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PilotLPTM [1.2K]
3 years ago
11

BRAINLIESTTT ASAP!!! PLEASE HELP ME :) Describe Chadwick’s work in Chemistry.

Chemistry
2 answers:
algol [13]3 years ago
7 0

Sir James Chadwick was the scientist who discovered the neutron. The electron and proton had already been found but with the neutron known, we knew everything that made up our universe. He won the 1935 Nobel Peace Prize for his discovery.

Pie3 years ago
3 0

Answer:

Here's what I get.

Explanation:

James Chadwick is best known for his discovery of the neutron in 1932.

Earlier research

Before 1932, the only subatomic particles known were the electron and the proton. Scientists thought that the nucleus contained both protons and electrons.

For example, they thought a helium atom contained four protons and two electrons, with two electrons orbiting the nucleus.

In 1928, German physicists discovered that beryllium nuclei,  when bombarded with α particles, emitted a strange type of extremely energetic radiation. It had no charge, because it wasn't deflected by electric or magnetic fields. Neither was it γ-rays, because it did not discharge an electroscope.

In 1932 Irène and Frédéric Joliot-Curie discovered that the radiation knocked protons  loose from paraffin, and they could be detected by a Geiger counter. They, too, thought the radiation was some type of strange γ-rays .

Chadwick's work

Chadwick did not believe their explanation.

He quickly repeated their experiments with paraffin and also used other substances as targets.

He couldn't observe the uncharged radiation directly, but he could count the protons and measure their energies as they were ejected from the targets.

By working backwards and using the  laws of conservation of energy and momentum, Chadwick concluded that the radiation must consist of neutral particles with a mass 1.0067 times  that of a proton.

He had discovered the neutron.

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3 years ago
Why does water work bad with oil? Explain
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3 0
3 years ago
Read 2 more answers
For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply.
FromTheMoon [43]

The reaction is incorrect. The correct reaction is: Na₂SO₄ + Hg(NO₃)₂ → HgSO₄ + 2NaNO₃. The options are:

A. Hg₂SO₄

B. Na₂SO₄

C. Na⁺

D. NO₃⁻

E. SO₄⁻²

F. Hg₂(NO₃)₂

G. NaNO₃

H. Hg⁺²

Answer:

C, D, E, H

Explanation:

The ions are formed after dissociation of the compound in the solution. When they're negatively charged, they're called anions, when they're negatively charged, they're called cations. If the ion is presented on both sides of the reaction, it is called a spectator ion.

Thus, the reaction given:

Na₂SO₄ + Hg(NO₃)₂ → HgSO₄ + 2NaNO₃

So, let's do the dissociation.

Na₂SO₄ is formed by the ions Na⁺ and SO₄⁻²;

Hg(NO₃)₂ is formed by the ions Hg⁺² and NO₃⁻;

HgSO₄ is formed by the ions Hg⁺² and SO₄⁻²;

NaNO₃ is formed by the ions Na⁺ and NO₃⁻.

Thus, the spectator ions are Na⁺, SO₄⁻², Hg⁺², and NO₃⁻.

7 0
3 years ago
Use the following balanced equation to answer the questions below.
Blababa [14]

Answer:

A. 4.5 mol Mg(OH)₂

B. 6 mol NaOH

Explanation:

Let's consider the following balanced equation.

Mg(NO₃)₂ + 2 NaOH ⇒ Mg(OH)₂ + 2 NaNO₃

PART A

The molar ratio of NaOH to Mg(OH)₂ is 2:1. The moles of Mg(OH)₂ produced from 9 moles of NaOH are:

9 mol NaOH × 1 mol Mg(OH)₂/2 mol NaOH = 4.5 mol Mg(OH)₂

PART B

The molar ratio of NaOH to NaNO₃ is 2:2. The moles of NaOH needed to produce 6 moles of NaNO₃ are:

6 mol NaNO₃ × 2 mol NaOH/2 mol NaNO₃ = 6 mol NaOH

5 0
3 years ago
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