What is the atomic number of an atom that has 8 protons 8 neutrons and 7 electrons?
What is the atomic number of an atom that has 8 protons 8 neutrons and 7 electrons?
Answer 8: An oxygen atom usually has 8 protons, 8 neutrons, and 8 electrons. Looking at the periodic table, oxygen has atomic number 8 and atomic weight 15.999. The atomic number tells you how many protons are in the atom’s nucleus.
What is the mass number and name of an element with 8 protons and 8 neutrons group of answer choices?
Oxygen is the 8th element in the periodic table. This means that oxygen has 8 protons and 8 electrons. In order to get the number of neutrons you take the atomic weight in this case and you subtract it by the number of protons (16-8).
What element has 7 Protons 8 neutrons?
Nitrogen atom
What has 17 protons and 18 neutrons?
chlorine atom
What is the most basic building block of matter?
Scientists once thought the most fundamental building block of matter was a particle called the atom. Now we know that the atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons.
How do you find the number of electrons?
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
What is the mass number of an atom equal to?
Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
How do you calculate the number of protons?
Calculating numbers of subatomic particles To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number. number of neutrons = mass number – atomic number.
What is the relationship between mass number and atomic number?
Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
What is the mass number defined as?
Mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.