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Is this true or false the mass of a proton is about one atomic mass unit?
The mass of the proton is a little greater than 1 amu:
Is this statement true or false The isotope hydrogen-1 is the standard used for the relative scale of atomic masses?
true
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.
The weight of subtomic particles is measured in units called atomic mass units true or false?
Yes, true: the mass of 1 proton is exactly the same as of 1 neutron: 1 a.m.u.
Is it true that The atomic mass is equal to the atomic number?
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
Base weight a system of comparing atomic weights to carbon is it true or false?
True. The unit for the atomic weights of chemical elements is the relative atomic mass unit (1/12 from the atomic mass of the isotope 12C). Note that atomic weights is used for elements and atomic mass for isotopes.
Is this true or false the mass of a proton is about one atomic mass unit?
The mass of the proton is a little greater than 1 amu:
Is it true or is it false Electronegativity increases continuously as atomic number increases?
False, because the only element with the highest Electronegativity is hydrogen and the atomic number is 1.
Is this statement true or false The isotope hydrogen-1 is the standard used for the relative scale of atomic masses?
true
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 sun made mostly of hydrogen and helium true or false?
True. The Sun is mainly composed of hydrogen (about 74% of its mass) and helium (about 24% of its mass). The remaining 2% consists of trace amounts of heavier elements.
The weight of subtomic particles is measured in units called atomic mass units true or false?
Yes, true: the mass of 1 proton is exactly the same as of 1 neutron: 1 a.m.u.
State true or false Hydrogen is insoluble in water?
False False False FalseFalse
True or false that hydrogen is the least common element in the universe?
It is false.
True or false The number of neutrons is equal to the atomic number?
This would be false. The atomic number is equal to the number of protons and the neutrons are the number you add to protons to equal the mass number (to find round the atomic weight).
Water H2O is composed of hydrogen and oxygen true or false?
True
Is it true that The atomic mass is equal to the atomic number?
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
