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One proton, one electron per atom.

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What common compound has 2 hydrogen and 1 oxygen?

Water or H2O


How are hydrogen 1 and hydrogen 2 alike?

Both hydrogen-1 and hydrogen-2 are isotopes of hydrogen, with hydrogen-1 being the most common isotope and hydrogen-2 being a rare isotope known as deuterium. Both isotopes consist of one proton in their nucleus, but deuterium also has one neutron alongside the proton, making it heavier than hydrogen-1.


What is common about hydrogen-1 and deuterium-2?

Both are isotopes of hydrogen with 1 proton and 1 electron. H-1 (protium) has 0 neutron whereas H-2 (deuterium) has 1 neutron


What is the atomic number and mass number of hydrogen?

Hydrogen it the first element in the Periodic Table. So it has Atomic No. of '1'. For its most common isotope it has an atomic mass of '1'. Hydrogen exists as three isotopes'- #1 ; protium ; Atomic mass '1' ; 1 proton, 0 neutrons, 1 electron #2 ; deuterium ; Atomic mass '2' ; 1 proton, 1 neutron, 1 electron. #3 ' tritium; Atomic Mass '3'; 1 proton, 2 neutrons, 1 electron. protium is the most common isotopes of hydrogen mass of '1' ( 1 + 0 = 1) deuterium is less common and is known as 'heavy hydrogen' mass '2' (1+1=2) tritium is rare and is radio-active, and known as 'super heavy hydrogen' (1 + 2 =3) mass '3'.


How do the isotopes hydrogen-1 and hydrogen-2 differ?

Hydrogen-1 has no neutrons while Hydrogen-2 has 1 neutronA hydrogen-1 atom (normal hydrogen) has 1 proton and 1 electron whereas a hydrogen-2 atom (deutrium) has 1 proton, 1 NEUTRON and 1 electron.


How many particles in a hydrogen atom?

The most common isotope of hydrogen has one proton, and one electron.The most common isotope of hydrogen has one proton, and one electron.The most common isotope of hydrogen has one proton, and one electron.The most common isotope of hydrogen has one proton, and one electron.


Using the periodic table entry below how many neutrons does the most common isotope of hydrogen have?

It depends on which element are u looking upon..if its hydrogen then it has three isotopes which have a different number of neutrons..this variation in the number of neutrons in the atoms of same element invented the concept of isotope.


What are the 2 most common elements and compounds?

the most common element is hydrogen and its molecule of two hydrogen atoms is the most common molecule


2 1 H is a n of hydrogen?

2:1 is the ratio of hydrogen atoms in a molecule.


What is the atomic number of hydrogen and the number of its electrons in the outer shell?

The Atomic No. of hydrogen is '1' . Often indicated by ' Z = 1 '. It is the first and least massive element in the Periodic Table. Hydrogen's atomic structure is ;- 1 proton and 1 electron. However, Hydrogen exhibits three ISOTOPES. They are : - protium ; 1 proton , 1 electron , 0 neutrons ; Atomic mass = 1 deuterium ; 1 proton , 1 electron , 1 neutron ; Atomic mass = 2 tritium ; 1 proton , 1 electron , 2 neutrons ; Atomic mass = 3 Hydrogen's symbol is 'H'. protium isotope is the most common isotope of hydrogen and generally referred to as hydrogen . Atomic Mass is 1 proton + 0 neutrons = 1 Symbolically, [1/1]H deuterium isotope(D) is far less common isotope of hydrogen and generally referred to as 'heavy hydrogen' and makes ' heavy water'. Atomic Mass is 1 proton + 1 neutrons = 2 Symbolically [2/1]H tritium isotope (T) is very rare isotope of hydrogen and generally referred to as 'super-heavy hydrogen' and is radio - active Atomic Mass is 1 proton + 2 neutrons = 3 Symbolically as [3/1]H NB The next element in Periodic Table is Helium (He) Its atomic structure is 2 protons, 2 neutrons, and 2 electrons. Helium's symbol is 'He'. It is the most inert element of all. Atomic Mass is 2 proton + 2 neutrons = 4 Symbolically, [4/2]He Note the differences between hydrogen and helium atomic structures.


What is the most common oxidation number for hydrogen?

+1 is most common


What is the second isotope of hydrogen?

Deuterium, it has 1 neutron and one proton.