if an atom has 49 protons, how many electrons does it have?

Answer 1

They are always equal. Element is Indium

Answer 2

If you have an atomic chart or periodic table of the elements in your science book, you should take a look at it and try to understand how it works.

All the atoms are listed in order by how many protons they have. Protons are in the nucleus (center) of the atom. They have a positive electric charge. Every atom has the same number of electrons as it has protons.

The electrons are on the outside of the atom and have a negative electric charge.

So when the number of protons and electrons is equal, the electricity in the atom is balanced out (neutral). When different atoms hook together (chemically combine) what often happens is, one atom will loan out an electron from one atom to another. Some atoms like to loan an electron, and some like to borrow an electron. The ones that like to loan are called "metals" and the ones that like to borrow are called "non-metals."

If an atom is balanced with the same number of protons and electrons then what happens if it borrows or loans an electron? It isn't balanced any more. It has either more electrons than protons, in which case it has a negative electrical charge, or if it has loaned out an electron, so it has more protons than electrons, it will have a positive electrical charge. Atoms that have either a positive charge or a negative charge are called "ions."

All atoms except hydrogen have neutrons. (sometimes hydrogen has 1 or 2 neutrons, but usually a hydrogen atoms doesnt have any) - neutrons are in the nucleus of the atom and do not have any electrical charge so they do not have anything to do with whether an atom is an ion or not. But they do make a difference.

Neutrons have mass (or weight, you could say, if you dont want to get too technical!) For any hydrogen atom, there is one proton (which has a weight of 1 atomic mass unit).

When a hydrogen atoms has no neutrons its weight all comes from the proton and it has a total weight of 1. But if the hydrogen atoms also has one neutron then its total weight is 2. And if it has two neutrons, the weight is 3 atomic mass units (one proton plus two neutrons equals three). OK, the different forms of hydrogen, with a weight (or mass, if you want to get technical) of one, two or three are called "isotopes." isotopes are versions of an element where the atoms have the same protons, but different numbers of neutrons.

So, There you go! :)

Answer 3

If the atom is neutral and has not combined with another atom it has 49 electrons. In bonding electrons are given or taken to form the bonds.Then the number of electrons changes and the atom gets a charge.

Answer 4

There are generally an equal number of electrons as there are protons.

However, some types (called isotopes) of an element can contain more or less electrons, many times changing its behavior. If an element (for example, hydrogen) has lost an electron, it is called an ion (or hydrogen ion in this case).

49.

Answer 5

Always 49 in the uncombined state.

Answer 6

The same as the number of protrons, 49.

Answer 7

if neutral, then also 49 electrons.

Answer 8

if you are in 3rd grade: 49, if you are in high school the isotope answer works.

Answer 9

It depends on how excited the atom is

Answer 10

usually 49, but it can have more or less if its an anion or ion.