We know that any known element is defined by the number of protons in its nucleus (which is the same as the number of orbiting electrons).
We can define isotopes as the atoms of the same element but that have a different number of neutrons in the nucleus. The correct statement of the difference between stable isotopes and unstable isotopes is:
"The difference between a stable isotope and an unstable isotope of an element is that the unstable isotope has a nucleus that decays spontaneously, is radioactive, and can be transformed into an atom of another element"
Particularly we can define two of these, the stable isotopes, that can remain as they are for a lot of time, and the unstable isotopes, that have more neutrons in its nucleus than a stable isotope, and because having those extra neutrons in the nucleus needs energy, eventually the isotope will experience a spontaneous radioactive decay, which "breaks" the nucleus in different ways, and, in some cases, generates different elements in the process.
Then we can conclude that:
"The difference between a stable isotope and an unstable isotope of an element is that the unstable isotope has a nucleus that decays spontaneously, is radioactive, and can be transformed into an atom of another element"
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What common group name is carbon in on the periodic table?
Answer: it's group 14
Explanation:
The common group name for carbon is Group 14 (IVa) on the periodic table.
Nitrogen is inactive gas, why?
because it doesn't react easily with other elements it requires high heat and other things
yo help me do this asap pls
Answer:
l think it's hydrogen chloride
Explanation:
pls answer this question
9 qn is bio i think
pls
Answer:
7. A. properties that differ from both iron and oxygen
8. D. cool the rod and heat the cylinder
9. B. sea level to a mountain top
An element has an atomic number of 16. An ion of this element has a 2-charge. How was the ion formed?
Answer: The answer is ‘a neutral atom gained 2 electrons’
Explanation: Because electrons are negatively charged and adding 2 extra would make the ion negatively charged by 2
Answer:
The answer to all the quiz questions are
Explanation:
1. Which statement describes the number of protons in each atom of an element?
*The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.*
2. An element has an atomic number of 16. An ion of this element has a 2– charge. How was the ion formed?
*A neutral atom gained 2 electrons.*
3. Rubidium has an atomic number of 37 and a mass number of 85. How many protons, neutrons, and electrons does an ion of rubidium with a 1+ charge have?
*37 protons, 48 neutrons, and 36 electrons*
4. There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?
*Their atomic masses differ.*
5. Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?
*5*
Aqueous lead (II) nitrate, Pb(NO3)2 undergoes a double displacement reaction with aqueous sodium chloride, NaCl, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this reaction. Be sure to include the states of each of the reactants and products
Answer:
[tex]{ \sf{Pb(NO_{3})_{2(aq)} + 2NaCl _{(aq)} → 2NaNO_{3(aq)} + PbCl _{2(s)} }} \\ [/tex]
Someone plz help me :(
Answer:
Descriptive investigations use careful observations and measurements to develop findings. Science journals, science logs, and field notebooks are some of the tools scientists use to gather information for descriptive investigations.
Explanation:
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Answer:
C
Explanation:
it would be the best action because questions are important when looking at designs/creating them.
32.5 g to fluid ounces
name gaseous element in period 2 group 16?
Answer:
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Explanation:
Oxygen
In store A: A box of cotton candy costs 1 dollar, 12 boxes cost 12 dollars. In store B: 12 boxes cost 48 dollars. How much does each box cost in store B?
Answer:
4
Explanation:
If there is 12 boxs that cost $48, you need to divide the 12 boxs into the $48 to see how many time 12 goes into it to see how much it is. So 48 divided by 12 is 4.
In what situation would you most likely need to use a computer to analyze data?(1 point)
When you have collected a lot of data most likely need to use a computer to analyze data. Option B is correct.
What is the analyzed data?The analyzed data is a system in which the unmanaged data or the messy data can be arranged in a recognizable sequence for the better study of something for which data is to be maintained.
The computer is needed for the process as the computer has some special characters to maintain tables according to alphabets and according to the number and can be taken out anytime want.
Therefore, Option B is correct. When you have collected a lot of data most likely need to use a computer to analyze the data.
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what amount (in moles) is present in 2.0g of sodium hydroxide,NaOH
Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
Based on the equation, how many grams of Br2 are required to react completely with 36.2 grams of AlCl3? 2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2 (5 points)
a) 65.2 grams
b) 69.8 grams
c) 72.1 grams
d) 76.5 grams
Explanation:
basically, you'll just have to convert the given grams into moles, convert that into moles of Br, and then convert it again into grams of Br
The amount of gram of [tex]Br_{2}[/tex] will be 65.1 grams in equation [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
What is gram?The definition of a gram was given as the mass of one cubic centimeter of pure water at 4 degrees Celsius.
Calculation of amount of [tex]Br_{2}[/tex]
The given equation is [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
The mass of [tex]Br_{2}[/tex] = Count of bromine molecule × molar mass
The mass of [tex]Br_{2}[/tex] = 0.4072 × 159.8
The mass of [tex]Br_{2}[/tex] = 65.08 mol.
The amount of gram of [tex]Br_{2}[/tex] will be 65.1 grams in equation [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
Therefore, the answer will be option (a).
To know more about gram.
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Write a word equation for the chemical reaction.
I’ll brainlist.
Answer:
potassium hydroxide + sulfuric acid → potassium sulfate + water.
Explanation:
Hope it helps.. if yes, plz mark me as brainliest
I need help with this question
Answer:
ok ok ok okbokvjhkeokkd
Pls help with these two questions~-~
• 2. Using the following formula Force (N) = mass (kg) * acceleration (m/s").
What is the force of a ball with a mass of 5kg fallinly to the ground at
10m/s.
Answer
50 N
Explanation
briefly explain how to separate a mixture of water, kerosene, sawdust and nahso4?
Answer:
Use filtration method lol.
Quais são as fórmulas das bases formadas pelos respectivos cátions Au3+, Fe2+, Pb2+, Na+ e Mn4+? *
Answer:
This is an English server, sorry
Explanation:
can someone answer this
Answer:
[tex]{ \underline{ \sf{solubility}}}[/tex]
Melting is
A. state of matter change from solid to gas.
B. state matter change from solid to liquid.
C. state of matter change from gas to liquid.
D. state of matter change from liquid to solid.
Answer:
b is correct
Explanation:
Answer:
B. state matter change from solid to liquid.
Explanation:
Melting happens when a solid turns (melts) into a liquid.
hope i helped
Solid solid soluton example
Explanation:
rice and rice coatssalt and sugarsand and mudwheat flour and corn flourPlease help me with this chemistry
Answer:
platinum is the correct answer
Answer:
it would be made of platinum
Explanation:
which atom is indicated by this configuration - [Ne] 3s^1
Explanation:
Neon is [Ne] 3s2 3p3 = 1s2 2s2 2p6 3s2 3p3.
What would the car weigh on Earth with a gravitational pull of 9.8 N/kg?
Answer:
Explanation:s the gravitational field strength on Earth's 9.8 N kg?
The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram).
please answer quick...................
Answer:
3). C
Explanation:
When inter-nuclear distance [ atomic radius ] is smaller, the nuclear attraction has a greater magnitude.
[tex].[/tex]
Starches and sugars being broken down during energy production
a
Chemical Change
b
Physical Change
Answer:
A. Chemical ChangeExplanation:
When starches and sugars are being broken down during energy production it represents chemical change.[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
What are some possible molecules that could have the empirical formula, XY2Z?
Answer: a
Explanation:
i took the test
A statement that describes what scientists expect to happen every time under a given set of conditions is call a scientific
Answer:
law
Explanation:
it is called a scientific law