What is the difference between an atom and ion. What makes an ion an ion?
Answers
Answer:
atoms are neutral or they have equal number of proton and electron but ions can be cation(positively charged) or anion(negatively charged) based on the number of electron the atm lose and gain respectively
Final answer:
An atom is the smallest unit of matter, with a neutral charge. An ion, however, is an atom that has either gained or lost electrons, giving it a net positive or negative charge. The difference between an atom and an ion is thus primarily about their charge.
Explanation:
An atom is the fundamental unit of matter made up of protons, neutrons, and electrons. In a neutral atom, the number of electrons (which carry a negative charge) equals the number of protons (which carry a positive charge). This makes the overall charge of an atom neutral.
An ion, on the other hand, is an atom that has gained or lost electrons, thus it has a net charge, as the number of electrons does not equal the number of protons. Positive ions, or cations, form when an atom loses electrons, and negative ions, or anions, form when an atom gains electrons.
For example, the anion of chlorine is chloride, and the anion of sulfur is sulfide. The difference between an atom and an ion, therefore, lies primarily in their charge, stemming from the shift in the balance between their numbers of protons and electrons.
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Please helpRadiocontrast dyes are considered safe because the isotopes have short half-lives and the isotopes coat the gastrointestinal tract and are not absorbed by normal tissue. If a patient ingests 10.0 mg of iodine, how long until the iodine-134 is 99% out of the patient's system if the half-life of iodine-134 is 52.6 minutes?
Answers
Source: Exam as well
Good luck!
Answers
Answer: The correct answer for the blank is-
B) cytoplasm.
Cytoplasm is the fluid filled compartment ( a thick, gel like substance) within the cell of a living organism that is mainly composed of water, salts, and proteins. It is surrounded by the cell membrane ( plasma membrane) and contains all the parts of cell ( such as in eukaryotic cell, it contains all the cell organelles except nucleus). It is the site for all the essential cellular processes.
Thus, option B) is the right answer.
Answer: Option (B) is the correct answer.
Explanation:
- In a living organism, the cell which is mostly composed of water, salts and proteins is known as cytoplasm.
It is thick and gel like in nature which has fluid filled compartment.
- A chloroplast is an organelle found in the cells of plants and eukaryotic algae which are responsible for the conduction of photosynthesis.
- Nucleus is an organelle present in eukaryotic cells. It contains hereditary information of a cell and helps in controlling the growth and reproduction of cells.
- Polymers of amino acids are known as proteins. Each protein has some specific functions.
Thus, we can conclude that out of the given options cytoplasm is a gel-like substance enclosed by the cell membrane that contains the cell's organelles.
B. Ca
C. Na
D. Mg
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Answer: D. Mg
Explanation:
Chemical reactivity is defined as the tendency of an element to loose of gain electrons.
Metals are the elements which lose electrons and hence, their chemical reactivity will be the tendency to lose electrons.
Their chemical reactivity increases as we move top to bottom in a group because the valence shell come gets far away from the nucleus. Thus, the loss of electron from the valence shell becomes easier due to lesser attraction between nucleus and valence electron.
Their chemical reactivity decreases as we move from left to right in a period .As, the electrons get added up in the same shell, the electron in the outermost orbital gets near to the nucleus. And hence, the electron will be difficult to lose.Thus, the chemical reactivity of metals decreases.
For the given options:
Potassium(K) belongs to Group 1 and period 4 of the periodic table.
Calcium (Ca) belongs to Group 2 and period 4 of the periodic table.
Sodium (Na)belongs to Group 1 and Period 3 of the periodic table.
Magnesium (Mg) belongs to Group 2 and Period 3 of the periodic table.
Order of reactivity of metals follow:
Thus the LEAST reactive metal is Magnesium.
A. The temperature at which intermolecular forces push the
molecules apart
O
B. The temperatud at which the kinetic energy breaks the
intermolecular attractions
O
c. The temperature at which the pressure forces molecular motion to
stop
D. The temperature at which the atomic bonds within the molecules
are broken
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Answer:
A solid will melt at the temperature at which the kinetic energy breaks theinter-molecular attractions.
Explanation:
The melting point is the state at which "a substance changes its temperature from a solid to liquid". At the melting point temperature, there is an equilibrium between the both the solid and the liquid phase. When the solid particle is heated by increasing the temperature the particle in the solid vibrate quickly and it absorbs kinetic energy.
It leads to the breaking of the organisation of particle in between the solid and that leads to the melting of solid. Thus, at the melting point, the kinetic energy breaks the inter-molecular attractions.
Answer: B) the temperature at which the kinetic energy breaks the intermolecular attraction
Answers
Answer: 2= baby being developed= embryo 1 i dont know sorry
Explanation:
Answer:
Pollen grains is the Male reproductive organ.
An embryo is a zygote.
Explanation: