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Is this statement true or false The isotope hydrogen-1 is the standard used for the relative scale of atomic masses?
True. Hydrogen-1, also known as protium, is the standard used for the relative scale of atomic masses. Its mass is defined as exactly 1 atomic mass unit (amu) on the atomic mass scale.
John Dalton gathered evidence for the existence of atoms by measuring the masses of elements that reached to form compounds True or False?
True. John Dalton proposed his atomic theory based on experiments where he measured the masses of elements that combined to form compounds, leading him to conclude that all matter is composed of indivisible atoms.
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 it true or false that motion must be measured relative to a frame of reference?
True. Motion is always observed relative to a frame of reference, which provides a fixed point against which motion is measured. This allows us to quantify and describe the motion of an object accurately.
Are the number of neutrons equal to the atomic number minus the atomic mass?
false
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.
True or false- The volume of a gas cannot be measured?
false
Is the wave length measured from the crest to the trough true or false?
False. The wavelength of a wave is actually measured from crest to crest, or trough to trough, not from crest to trough.
Is wave length is measured from crest to the trough?
False, it is measured from crest to crest.
Heat is measured in Celsius degrees true or false?
False. Heat is measured in units of energy such as calories or joules, not in degrees Celsius. Temperature, on the other hand, is measured in degrees Celsius.
The volume of a gas cannot be measured?
FALSE
Is a toothpick measured in milligrams?
no
