What are the valences of carbon hydrogen nitrogen and oxygen?
Description. The combining capacity, or affinity of an atom of a given element is determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1.
What is the valence number for carbon?
four valence
Atomic carbon has six electrons: two inner shell (core) electrons in the 1s orbital, and four valence (outer most shell) electrons in the 2s and 2p orbitals.
What is the formula for carbon and oxygen?
Revision questions
| Word equation | carbon + oxygen → carbon dioxide |
|---|---|
| Chemical equation | C + O2 → CO2 |
| Picture equation |
How many bonds do carbon nitrogen oxygen and hydrogen form?
In these compounds carbon, nitrogen, oxygen, and chlorine atoms have four, three, two, and one bonds, respectively. The hydrogen atom and the halogen atoms form only one covalent bond to other atoms in most stable neutral compounds.
What are the valences of the four most common elements in living matter?
The first one asks about the valances of the four most common elements in living matter. So hydrogen, oxygen, nitrogen and carbon. Yeah. And the valance, valance C or violence refers to how many bonds that could make with something like hydrogen in other words, how many free spots does it have?
What is the number of valence electrons for oxygen?
six valence electrons
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen’s valence electrons as 2s²2p⁴.
What is the outermost energy level for carbon?
four valence electrons
More than 90 percent of all known compounds contain carbon. Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons.
How is oxygen valency 2?
Solution: Valency is the number of particular atoms combined with or displaced with another atom to form a compound. Water which is H_2O, two atoms of hydrogen combine with one atom of oxygen. The valency of oxygen is 2, because it needs two atoms of hydrogen to form water.
What is the valency of oxygen +2 or?
there is need to be atmost 2 electrons are present in first shell of an atom . and in second shell there are 8 electrons are needed to form stable octate. but oxygen only have 6 electrons in 2nd shell.so,oxygen needs 2 electrons to complete its octate. HENCE,THE VALENCY OF OXYGEN IS TWO.
What type of reaction is carbon and oxygen?
It is a combustion reaction as carbon is burnt in the presence of oxygen.
Why does carbon react with oxygen?
Carbon reacts with oxygen to produce carbon dioxide which is an exothermic reaction, where 394 kJ/mol of heat is produced.