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aliina [53]
3 years ago
12

How many electrons are in the element

Chemistry
1 answer:
Aliun [14]3 years ago
8 0

Answer:

Number of electrons differ from one elements to other elements .means that each elements have different numbers of electrons

for ex Hydrogen has only one electron whereas helium has 2 electrons

Number of electrons = Atomic number

Atomic number of an element tells the no. of electrons in it.

For ex

Hydrogen ( atomic no. 1 ) ---- 1 electron

helium ( atomic no 2 ) ---- 2 electron

Lithium (atomic no.3 ) ---- 3 electron

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The ________________and ______________ of magma cause igneous rocks to form.
LekaFEV [45]

Answer:

The solidifying/cooling and crystallizing of magma causes igneous rocks to form.

6 0
3 years ago
What is 0.00000005 in scientific notation, rounded to two significant figures?
KIM [24]

Answer:

5×-10^8

That is the the scintific notation for 0.00000005

Answer=5×-10^8

7 0
3 years ago
Exactly 1 mol Hg2(NO3)2 contains how many moles of Hg , N , and O ?
marin [14]

In exactly 1 mol Hg₂(NO₃)₂ , there are 2 mol Hg, 2 mol N and 6 mol O.

Since the molecular formula of Hg₂(NO₃)₂ shows that for every mole of the substance, we have 2 moles of Hg, 2 moles of N and 6 moles of O.

So, in exactly 1 mol Hg₂(NO₃)₂ , there are 2 mol Hg, 2 mol N and 6 mol O.

Learn more about number of moles here:

brainly.com/question/3935424

6 0
2 years ago
MARK BRAINLIEST AND 14 POINTS
LekaFEV [45]

Answer:

She could prove that it is a combination of substances by looking for a change in color, or the formation of bubbles. She could also try to pull the combination apart by physical means alone.

Explanation:

4 0
3 years ago
Read 2 more answers
Does anyone know the answers for these
Alexeev081 [22]

Answer: 1. 0.045moles

2.  2.10 grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

1. \text{Number of moles of zinc nitrate}=\frac{8.51g}{189.36g/mol}=0.045moles

2. Mass of C_2H_4=moles\times {\text {Molar mass}}=0.075moles\times 28.05g/mol=2.10g

4 0
2 years ago
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