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Europium is element number 63, one of the Lanthanoids. The "3 plus" indicates its valence number is +3.
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What 2 numbers are shown in tye periodic table for each element?
The number above the symbol is the atomic number, or the number of protons in the nucleus of one atom of the element. It is this number by which they organized the periodic table. If this number changes so does the identity of the element. In a balanced atom this number will also be the number of electrons in the electron cloud. The number below is the atomic mass number, or the average number of particles (protons plus neutrons) in the nucleus. Since the number of neutrons can change this number must be given as an average so it may contain a decimal.
Where is the atomic mass located?
the atomic mass is the number of neutrons plus protons/electrons in an element. it is found under the sybol on an element's card.
What is the difference between atoms elements and the periodic table?
Valence electrons are the electrons on the outermost shell of an atom. Elements on the periodic table is the substance. For example titanium is an element, oxogen is an element. The elements on the periodic table are classified by their atomic number. The atomic number is the number of protons in the nucleus of the atom. Also for each element there is the atomic mass. The atomic mass is the number of protons plus neutrons. The units for atomic mass is amu (atomic mass units). Elements in the same column have the same number of valence electrons, so they tend to behave similarly.
What is the atomic number and the atomic mass of lithium?
Hydrogen has 1 as its atomic number. That's because it has one proton in its nucleus. Hydrogen has three isotopes. Each isotope has one proton in its nucleus (naturally, because that's what makes it hydrogen). Atomic mass is the number of protons plus the number of neutrons in an atom's nucleus. Let's look at each isotope of hydrogen. "Simple" hydrogen has only the 1 proton in its nucleus. It's atomic number is 1 and its mass number is 1 (the 1 proton plus zero neutrons). Heavy hydrogen has 1 proton and 1 neutron in its nucleus. It's atomic number is 1 and its mass number is 2 (the 1 proton plus 1 neutron). Heavy, heavy hydrogen has 1 proton and 2 neutrons in its nucleus. It's atomic number is 1 and its mass number is 3 (the 1 proton plus 2 neutrons).
How many neutrons are in 23 11Na plus 1?
Elements differ from one another according to the number of protons in the atoms' nuclei. Essentially, the number of protons indicate the element (not its reactivity).11 is the atomic number of SodiumAtomic number (in this case, 11,) is the number of protons in the element.The 23 is telling you the atomic mass of the element (usually listed underneath the element symbol on the periodic table). The atomic mass of Sodium on the table is usually around 22.989.... so rounded to 23 for you in this question.The atomic mass is the mass of protons plus neutrons(each about 1 atomic mass units).Electron are so relatively light they do not significantly contribute to the mass of an element.
What 2 numbers are shown in tye periodic table for each element?
The number above the symbol is the atomic number, or the number of protons in the nucleus of one atom of the element. It is this number by which they organized the periodic table. If this number changes so does the identity of the element. In a balanced atom this number will also be the number of electrons in the electron cloud. The number below is the atomic mass number, or the average number of particles (protons plus neutrons) in the nucleus. Since the number of neutrons can change this number must be given as an average so it may contain a decimal.
What property is used to determine the order of the elements on the modern periodic table?
Number of protons PLUS number of valence electrons (plus - if needed - number of electrons in inner shell).
The mass number of an element is the number of?
Mass number is the atomic mass of a particular isotope (apex chem 5.3)
Is francium the most explosive element in the periodic table?
Yes, but it is closely followed by Caesium and Rubidium. Type Caesium and water into youtube. It is COOL!..........................plus there is no j on the periodic table
Which number is the atomic mass?
The atomic mass of an element is average of the number of protons in an atom plus the number of neutrons. For example, if you look at a periodic table of elements, Hydroge has the atomic mass of 1.0079.
How does alkali earth metals reacts to other elements in the periodic table?
Through compounds (one element plus another (only some have been found the periodic table always changes))
Where is the atomic mass located?
the atomic mass is the number of neutrons plus protons/electrons in an element. it is found under the sybol on an element's card.
What element is made up of 16 protons?
Look up the periodic table, atomic number 16, and find Sulphur. That's only a start because there are neutrons as well, plus electrons.
On the periodic table the number of proton plus neutron is called the?
The name for it is Mass Number of an Isotope.
What is the difference between atoms elements and the periodic table?
Valence electrons are the electrons on the outermost shell of an atom. Elements on the periodic table is the substance. For example titanium is an element, oxogen is an element. The elements on the periodic table are classified by their atomic number. The atomic number is the number of protons in the nucleus of the atom. Also for each element there is the atomic mass. The atomic mass is the number of protons plus neutrons. The units for atomic mass is amu (atomic mass units). Elements in the same column have the same number of valence electrons, so they tend to behave similarly.
How do you find the mass number on the periodic table for the elements are calculated?
The mass number is the number of protons plus the number of neutrons in the atomic nucleus.
How do you obtain the mass number of an atom?
in order to obtain the mass number of an atom you must get the number of neutrons + the number of protons which = the mass number !!!hope this helped!!! :)
