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What is counted in an atom to determine mass number?
The mass number of an atom is determined by counting the total number of protons and neutrons in its nucleus. Electrons, which are much lighter than protons and neutrons, are not included in the mass number calculation.
An atom that has more neutrons than protons is called what?
An atom that has more neutrons than protons is called an Isotope.
An atom with a mass number of 45 has three more neutrons than protons What is the atomic number of this atom?
The atomic number is 21: The mass number is the sum of protons and neutrons, while the atomic number is the number of protons, designated n. From the statement of the problem, n+n+3 = 45, or 2n = 42, or n=21.
Is the mass number of an atom equal to the atomic number?
Only if the atom is hydrogen-1! The mass number of the atom is equal to the sum of the numbers of protons, which is the same as the atomic number, plus the number of neutrons. The only non-radioactive atom without neutrons is hydrogen-1.
Why does plutonium have a less mass then uranium?
Plutonium generally has a lower atomic mass compared to uranium because it has fewer protons and neutrons in its nucleus. Plutonium isotopes tend to have a smaller number of nucleons overall compared to most uranium isotopes, resulting in a lower atomic mass.
Neutrons are alot lower in the mass than protons?
It is a natural law; any explanation.
Have about 1800 times less mass than protons and neutrons?
Electrons have ~1800 times less mass than protons and neutrons
What is the difference in mass between protons and neutrons generally regarded as?
Protons are generally considered to have a slightly lower mass than neutrons. The mass of a proton is approximately 1.007 atomic mass units (amu), while the mass of a neutron is approximately 1.009 amu.
What has the smaller mass protons electrons or nutrons?
Electrons have the smallest mass compared to protons and neutrons. The mass of a proton is approximately 1836 times greater than the mass of an electron, and the mass of a neutron is slightly greater than that of a proton.
Are neutrons smaller than protons?
no, they both have the same relative mass, this is why you add the number of protons and neutrons to get the mass number for the atom. The neutron is very slightly more massive than proton, by about the mass of an electron.
What element has 48 neutrons and a mass less than 100?
Cadmium atomic number is 48. so, it can have 48 protons and neutrons and electrons each. it has mass less than 100. 96cadmium has 48 protons and 48 neutrons. 96 means its mass i.e, number of protons and number of neutrons
What two particles make up the atomic mass?
The atomic mass is made up of protons and neutrons in the nucleus of an atom. Protons have a positive charge, while neutrons have no charge. Electrons, which have a negative charge, are not included in the atomic mass as they are much lighter than protons and neutrons.
Which subatomic particles contribute the most to the mass of potassium?
The protons and neutrons contribute the most to the mass of potassium. Protons have a positive charge and determine the element's identity, while neutrons provide additional mass without affecting the charge. Electrons have negligible mass compared to protons and neutrons.
In subatomic particles do protons and neutrons have the same mass?
No, protons and neutrons do not have the same mass. Protons have a slightly smaller mass than neutrons. The difference in mass between the two particles is due to the different composition of quarks that make up each particle.
Why does the argon atom has a lower atomic number but a greater massnumber than the potassuim atom?
Argon has a lower atomic number than potassium because it has fewer protons in its nucleus. However, argon has a greater mass number than potassium because it has more neutrons in its nucleus. The mass number of an atom is determined by the sum of protons and neutrons in its nucleus.
What is found with the neutrons and have a greater mass than electrons?
protons
What differentiates each subatomic particle?
The mass and the charge. Protons are positively charged. Electrons are negatively charged. Neutrons have no charge. Protons and neutrons have similar mass (about 1 amu). The mass of electron is about 1822 times less than that of protons / neutrons.
