Which is a substance that is made up of only one type of atom?
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A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as(1) an ionic compound(2) a molecular compound(3) a metal(4) a nonmetal
A). Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po change into after it emits an alpha particle? b). Some undiluted acids aremore corrosive when they are diluted with water. That is why laboratory workers are told to wipe acid splashes with a towel before washing with a copious amounts of water. Explain.
What is a common use of bases?
Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+ ions in the water sample in ppm CaCO3?
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Answer: A) Na+ and O2-
Explanation:
To know the electronic configuration, one has to determine the numbers of electrons present in each atom.
Na+ means a sodium atom that has lost one valence electron. A Sodium atom initially has 11 electrons, but having lost an electron making it 10 electrons remaining with electron configuration of 1s2 2s2 2p6.
O2- means oxygen atom that has gained two valence electrons. An oxygen atom initially has 8 electrons, having gained two electrons makes it 10 electrons with electron configuration of 1s2 2s2 2p6. same as Na+
The purpose of gaining or losing electrons is to attain a stable duplet or octet structure.
The two ions with same electronic configuration are Na and O²
.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons of an atom or a molecule in orbitals of an atom or of a molecule.It describes each electron which is moving independently in it's orbital.
Electrons are able to move from one configuration to another by either absorption or emission of a quantum of energy, which is called as a photon.It is useful in understanding the structure of periodic table.
Considering the pair of sodium cation and oxygen anion the sodium atom with one positive charge has 10 electrons and oxygen anion with two negative charge has 10 electrons .
The elements with same number of electrons are called isoelectronic species.
Learn more about electronic configuration,here:
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Answer:
Glucose
Explanation:
Glucose is a source of energy and it is stored in the body (in the form of glycogen) and it can also dissolve in water.
A) 20.00%
B) 25.00%
C) 50.00%
D) 12.50%
E) 100.0%
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The correctanswer between all the choices given is the 4th choice or letter D. I amhoping that this answer has satisfied your query and it will be able to helpyou in your endeavor, and if you would like, feel free to ask another question.
18
metallurgy
inductive reasoning
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the answer would be:
C. metallurgy
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Answer:
The answer to your question is below
Explanation:
Question 2.
Answer: The molar mass is found by taking 2 x the molar mass of K, plus 1 x the molar mass of sulfur, plus 4 x the molar mass of oxygen.
Question 3.
molar mass H₂O₂ = (1 x 2) + (16 x 2)
= 2 + 32
= 34.02 g
Use proportions to find the number of moles
34.02 g of H₂O₂ ----------------- 1 mol
4 g ------------------ x
x = (4 x 1)/34.02
x = 4/34.02
x = 0.1175 ≈ 0.118 moles
Answer: 0.118 moles
A. gas molecules are subject to ionic bonding
B. the separation of gas molecules is much greater than the volume they occupy
C. gases won’t explode the bag on very hot days
D. gas molecules don’t transfer excess Kinetic Energy
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The answer is; D
The reason for this is because gases are compressible . Much of the energy of the impact created when your head hits the air bad is absorbed by the gas (through compression and rarefaction) hence reducing the damage to the head in case of an accident.