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3 years ago

Can someone answer 5 for me please?

Chemistry

1 answer:

Usimov [2.4K]3 years ago

6 0

Answer:

Explanation:

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Many trials are not needed before a hypothesis can be accepted

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Your hypothesis is at the biggenning or the end of you summary

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4 years ago

What happens to impacts on the surface of bodies without an atmosphere?

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3 years ago

How does atomic radius change from top to bottom in a group in the periodic table?

suter [353]

The atomic radius increases as you would go down a particular group on the periodic table of elements. This is because along with a greater number of protons, there would also be electrons as well, and thus the need of electron shells surrounding the atom would also be required, to compensate for the more electrons, as according to the bohr model, each shell contains 8 electrons in its electron shell. Thus the distance from the nucleus to the outermost shell increases, the atomic radius.

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4 years ago

Read 2 more answers

Use the atom builder interactive to identify each nucleus. Two protons represented as purple spheres and one neutron represented

aleksandr82 [10.1K]

Answer:

$\frac{3}{2}He$

$\frac{6}{2} He$

$\frac{7}{4}Be$

$\frac{3}{1} H$

$\frac{6}{4}Be$

$\frac{7}{3} Li$

Explanation:

In the first nucleus we are told that there are two protons and one neutron. Let us remember that the mass number = number of protons + number of neutrons.

This implies that, for the first specie the mass number is 3, for the second specie the mass number is 6 and the third specie has a mass number of 7 and so on. The mass number is indicated as a superscript.

The atomic number is the number of protons in the nucleus of the atom and helps us to identify the atom. It is always written as a subscript as shown.

5 0

3 years ago

Balance the chemical equation

brilliants [131]

Answer:

$Fe_2O_3+3CO\Rightarrow \:2Fe+3CO_2$

Explanation:

$Fe_2O_3+CO\Rightarrow \:2Fe+CO_2\\\\Fe_2O_3+3CO\Rightarrow \:2Fe+3CO_2$

Best Regards!

8 0

3 years ago