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ValentinkaMS [17]
3 years ago
5

Why do electrons keep moving around the nucleus and not away from the atom

Chemistry
1 answer:
igomit [66]3 years ago
7 0
The atom's center, or nucleus, is positively charged and the electrons that whirl around this nucleus are negatively charged, so they attract each other. The reason the force is strong is because the atom is so small. The distance between the nucleus and the electrons is about 1 Angstrom (named after a famous scientist); this is 0.00000001 cm (10-8 cm) or about 4 billionths of an
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Assume that you measured exactly 2.0 mL of the sodium chloride solution into a small test tube. How many moles of sodium chlorid
Lera25 [3.4K]

Answer:

0.034 mol (4dp)

Explanation:

Use the formula n = m/M where n= number of moles, m=mass in grams and M=molar mass in g/mol.

Therefore to find how many moles, divide the mass in grams (2) by the molar mass of sodium chloride which is 22.99+35.45

4 0
3 years ago
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the individual components of a solution_____.a: can be separated by physical meansb: are chemically combinedc: react to form com
kap26 [50]
I believe the correct response is A. Can be separated by physical means.
4 0
3 years ago
How many significant digits are in the time measurement 60.010 seconds?
Gnoma [55]

Answer:

2 is your answer dude........

Explanation:

60.010=60.01

8 0
3 years ago
Elements in the same group/family of the periodic table are similar in what way?
Lera25 [3.4K]

Answer:

D)They have the same number of valance electrons.

Explanation:

The elements in the same group have same number of valance electrons thus have similar properties.

Consider the elements of group two i.e alkaline earth metals. All have two valance electrons and show similar properties.

Magnesium, barium, calcium etc.

All alkaline earth metals form salt with halogens.e.g,

Mg   +   Cl₂    →    MgCl₂

Ba    +   Br₂    →     BaBr₂

Mg   +   Br₂    →     MgBr₂

Ca    +   Br₂    →     CaBr₂

They react with oxygen and form oxides of respective metal.

2Mg   +   O₂   →    2MgO

2Ba   +   O₂   →    2BaO

2Ca   +   O₂   →    2CaO

these oxides form hydroxide when react with water,

MgO  + H₂O   →  Mg(OH)₂

BaO  + H₂O   →  Ba(OH)₂

CaO  + H₂O   →  Ca(OH)₂

With nitrogen it produced nitride,

3Mg + N₂     →  Mg₃N₂

3Ba + N₂     →  Ba₃N₂

3Ca + N₂     →  Ca₃N₂

With acid like HCl,

Mg + 2HCl  →  MgCl₂ + H₂

Ba + 2HCl  →  BaCl₂ + H₂

Ca + 2HCl  →  CaCl₂ + H₂

8 0
3 years ago
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What are three organisms that need oxygen?
Georgia [21]
Humans, Dogs and Cats all need oxygen to survive
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