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san4es73 [151]
3 years ago
10

The bottom number on each element on the Periodic Table is called

Chemistry
1 answer:
Flura [38]3 years ago
7 0

Answer:

The bottom number on each element of the periodic table are called the 4f series or lanthanoids and 5f or actanoids. They are also called inner transition elements.

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The proton-proton chain ____ (A) combines two hydrogen nuclei to produce a single helium nucleus and energy.(B) splits a helium
emmainna [20.7K]

Answer:

(C) is the mechanism that increases the temperature between the photosphere and corona of the sun.

Explanation:

When a stars is converted from hydrogen to helium then this is known as proton -proton chain reaction.Due to this reaction the temperature between corona of the sun and photosphere increases.The main reason for increasing the temperature is exothermic reaction.

So the option C is correct.

(C) is the mechanism that increases the temperature between the photosphere and corona of the sun.

8 0
3 years ago
does anyone know how to find the electron configuration of an element without using a periodic table?? group and period is alrea
snow_lady [41]
For that you have to use the Aufbau principle

For example, writing the electronic configuration of Fe(28)

I recommend that you memorize the aufbau principle. Once you learn it, you don’t need anything else except the atomic number of the element to write it’s electronic configuration.
8 0
2 years ago
Read 2 more answers
Please help on both I apologize for the horrible quality
NemiM [27]

Answer:

Explanation:

1)

H₂SO₄:

Element (symbol)     No of atoms in         No of compounds        Total atoms

                                    1 molecule                   coefficient

H                                              2                            1                                 2

S                                               1                                                                1

O                                              4                                                               4

2)

2H₃PO₄:

Element (symbol)     No of atoms in         No of compounds        Total atoms

                                    1 molecule                   coefficient

H                                              3                            2                                 6

P                                               1                                                                2

O                                              4                                                                8

There are two mole of H₃PO₄. One mole contain 3 hydrogen atom, 1 phosphorus atom and 4 oxygen atoms. Thus in two mole of compound 6 hydrogen atoms, 2 phosphorus atom and 8 oxygen atoms are present.

4 0
3 years ago
Be able to describe the relationship between Freedom of Movement and phase change.
lisabon 2012 [21]

Ion knoe Wdym by “be able to describ’ so ima put it in my own words idr lol:)

if you talm bout some kentic energy or sum ok but other Dan dat ion knoe tbh

I can explain how transferring kinetic energy in and out of a substance can cause a change

7 0
3 years ago
Balance the following reaction. P4 + 3 O2 → 2P2O5
agasfer [191]

Answer:

P₄ + 5O₂ → 2P₂O₅

Explanation:

8 0
3 years ago
Read 2 more answers
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