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Is the number of neutrons in an atom equal to the mass number minus atomic number?
Yes, it is true.
If an element has an atomic number of 45 and an atomic mass of 92 the number of protons it has is?
The atomic number always gives the number of protons or electrons. The neutrons are obtained by subtracting the number of protons from the atomic mass. In this example, since 45 is the atomic number, this element has 45 protons. since the mass is 92, the number of neutrons is 92-45= 47. However, this is not really true because the element with 45 as atomic number is rhodium and it has a mass of 103 u and hence a total of 58 neutrons.
Which are true statements A There are 6.02 times 1023 particles in a moleB The mass of 1 mol is the same as the atomic mass in grams A mole weighs 6.02 times 1023 amu A mole is the atomic mass?
The true statements are A and B. Statement A is called Avogadro's number and represents the number of particles in one mole. Statement B refers to the molar mass, which is the mass of 1 mole of a substance expressed in grams, and is numerically equal to the atomic mass in atomic mass units (amu).
When the elements on the periodic table are arranged by increasung atomic number the atomic mass generally increases as the atomic number increases. for some elements however the atomic mass of the el?
It is difficult to be sure what the question is about because it has been truncated.However, it is true that the atomic mass (or standard atomic weights) increases with atomin number. There are, of course, isotopes of elements with a low atomic number which are heavier than atoms of higher atomic number. But there are some examples where the average mass is not in the expected sequence.
True or false the mass of a proton is about one atomic mass unit?
False - an electron is about 1/1836 the mass of a proton.
Is the number of neutrons in an atom equal to the mass number minus atomic number?
Yes, it is true.
The number of neutrons is equal to the atomic number true or false?
False as a generalization but true for some isotopes. The atomic number is the number of protons in a nucleus, which may coincidentally be the same as the number of neutrons but is not required to be.
Can the atomic number be multiplied by two then equal the atomic mass?
Not generally. For light elements this relation is often approximately true, but for heavier elements, the gram atomic mass is more than two times the atomic number, as the ratio of neutrons to protons increases with increasing atomic mass.
True or false The number of neutrons is equal to the atomic number?
False. The number of neutrons is not equal to the atomic number. Neutrons are particles found in the nucleus of an atom and their number can vary, whereas the atomic number corresponds to the number of protons in an atom.
If an element has an atomic number of 45 and an atomic mass of 92 the number of protons it has is?
The atomic number always gives the number of protons or electrons. The neutrons are obtained by subtracting the number of protons from the atomic mass. In this example, since 45 is the atomic number, this element has 45 protons. since the mass is 92, the number of neutrons is 92-45= 47. However, this is not really true because the element with 45 as atomic number is rhodium and it has a mass of 103 u and hence a total of 58 neutrons.
Is it true that the mass number can be used to determine the number of electrons in an atom?
no --- atomic number
Which are true statements A There are 6.02 times 1023 particles in a moleB The mass of 1 mol is the same as the atomic mass in grams A mole weighs 6.02 times 1023 amu A mole is the atomic mass?
The true statements are A and B. Statement A is called Avogadro's number and represents the number of particles in one mole. Statement B refers to the molar mass, which is the mass of 1 mole of a substance expressed in grams, and is numerically equal to the atomic mass in atomic mass units (amu).
What element has a mass number of 7?
In any atom, the number of electrons present is equal to the number of protons present, and the number of protons is the atomic number. The only case where this would not be true is when you're dealing with an ion, but you aren't so your answer is 7.
When the elements on the periodic table are arranged by increasung atomic number the atomic mass generally increases as the atomic number increases. for some elements however the atomic mass of the el?
It is difficult to be sure what the question is about because it has been truncated.However, it is true that the atomic mass (or standard atomic weights) increases with atomin number. There are, of course, isotopes of elements with a low atomic number which are heavier than atoms of higher atomic number. But there are some examples where the average mass is not in the expected sequence.
Iron-56 mass number?
Iron is a metal element. Atomic mass of it is 56.
True or false the mass of a proton is about one atomic mass unit?
False - an electron is about 1/1836 the mass of a proton.
What is the true number of protons and atomic number in a neutral atom?
The numbers of each are equal! Therefore the atom is neutral.
