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you can't tell the Atomic Mass of an atom if either the number of protons or neutrons is missing. But Boron with 5 protons and 6 neutrons has and atomic mass of 11.

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What is the atomic number of an atom with mass number 9 and 5 electrons?

The atomic number is the number of Protons The mass number is the number of Protons and Neutrons The number of Electrons always equals the number of Protons Therefore according to the above information the atomic number of the atom is 5 HOWEVER there is NO element with a mass number (atomic mass) of 9 with an atomic number of 5. You question is impossible to answer. Beryllium has an Atomic mass of 9.0122 and an Atomic number of 4 Boron has an Atomic mass of 10.811 and an Atomic number of 5


A boron atom is made of?

The boron atom is made up of 5 electrons, 5 protons, and 6 neutrons. This element is low in abundance in both the solar system and the Earth's crust.


Boron has an atomic mass of 11 and an atomic number of 5 so the number of neutrons must be?

The number of neutrons in an atom is calculated by subtracting the atomic number from the atomic mass. In this case, for boron with an atomic mass of 11 and atomic number of 5, the number of neutrons would be 6.


If an atom has the atomic number of 4 and the atomic mass of 9.012 how many electrons will it have?

Atomic mass is protons + neutrons, and the atomic number (4) gives you the number of protons. Thus, this atom would have 5 neutrons.


If a neutral atom has a mass of 12 amu and an atomic number of 5 determine the number of protons neutrons and electrons in the atom.?

Protons: 5 Neutrons: 7 Electrons: 5


What usually forms a covelent bond and has 5 valence electrons and has the highest atomic mass in its group?

An atom that forms a covalent bond has 5 valence electrons and the highest atomic mass in its group is phosphorus (P).


How many electrons is there in boron if there is a atomic number or 5 and atomic mass of 11?

All you need is the atomic number, which gives the number of protons, in this case, 5. In any neutral atom the number of electrons is the same as the number of protons. So any neutral boron atom will have 5 electrons.


How many electrons are in an atom of Boron?

Atomic number = 5So there are 5 electronsAtomic number=protons=electrons


How many electrons are in an atom of 10B?

An atom of boron-10 (10B) has 5 electrons. The atomic number of boron is 5, indicating the number of protons and electrons in a neutral atom.


An atom that has 3 protons 4 neutrons and 3 electrons has an atomic number of?

The number of protons an atom has is equal to its atomic number. In this case, there are 3 protons, so its atomic number is 3 and this is lithium (Li), the third element on the periodic table. Atomic mass is sum of the number of protons and neutrons in the nucleus. Here, that is 3 and 4, respectively, giving our atom an atomic mass of 7. The number of electrons does not affect either the atomic number or the atomic mass, but instead determines the bonding properties of the atom and whether it has a charge. If the number of electrons is equal to the number of protons, as is the case here, the charge is neutral (0). If there are more electrons than protons, the atom will be negatively charged (5 electrons and 3 protons --> charge = -2), and if there are more protons than electrons, the atom will be positively charged (2 electrons and 3 protons --> charge = +1).


What do you notice about the atomic number and the total number of electrons in an atom of that element?

The atomic number is equal to the number of protons in an atom, which also corresponds to the number of electrons in a neutral atom. This means that the atomic number gives you the total number of electrons in a neutral atom of that element.


How many electrons are in a boron atom?

A neutral boron atom has 5 electrons. On the periodic table, the atomic number of boron is 5. This means that all boron atoms have 5 protons in their nuclei. Protons are positively charged, and electrons are negatively charged, therefore, a neutral boron atom has 5 protons and 5 electrons.