The element that is most likely to form covalent bonds with carbon (C) is
Selenium (Se)
Explanation
Covalent bond is formed when there is sharing of electrons among two or more non metals.
Both carbon and selenium are non metals therefore they react to form a covalent bond by sharing electron.
Despite krypton been a non metal it does not form a covalent bond with carbon since krypton is inert ( non reactive).
Beryllium (Be) and sodium (Na) are metals therefore they form ionic bond with carbon instead of covalent bond.
Answer: Option (c) is the correct answer.
Explanation:
Atomic number of carbon is 6 and its electronic configuration is 2, 4. So, in order to complete its octet, it requires 4 more electrons.
Therefore, carbon form covalent bonds, that is, it shares electrons with and electron deficient atom.
Krypton is a noble gas and has completely filled octet. So, it will neither give to share its electrons with carbon atom.
Whereas beryllium and sodium does not have enough valence electrons to share. Hence, they will not form bond with carbon atom.
On the other hand, selenium being a non-metal is electron deficient and therefore, in order to complete its octet it will share its electrons with carbon atom.
Thus, we can conclude that the element carbon (C) is most likely to form covalent bonds with the element selenium (Se).
2. Ba2SO4
3. BaSO4
4. Ba(SO4)2
Answer:
3. BaSO4
Explanation:
the math will show you, and to answer your commented question "How does this evidence indicate that the reaction has occurred between ions ?" :
The reaction of the ions can be checked by a number of methods. In a chemical reaction, the ions are in the aqueous solution. This means that they are in solution, dissolved with charge. During the reaction (ionic) there is an attraction between the positive and negative ions. This makes a change in the state of the reactants in the products. In addition, the reaction can result in an immediate observable change such as the formation of a solid or precipitation.
b. one millionth of a gram
c. approximately the mass of a proton
d. approximately the mass of an electron
Verbal and non-verbal
Quiet and loud
Simple and complex
Answer : Verbal and non-verbal communication wad used by Investigators in the past when trying to determine if someone was lying.
Explanation: In the Verbal communication information is transferred from one person to other by speaking.
Non-verbal communication includes Facial expressions , eye contact , body language, eyes blinking etc.
If someone is lying he or she will easily dermined by applying above things.
b. external diffraction.
c. total internal reflection.
d. interference
Answer:
(C) Total internal reflection
Explanation:
Total internal reflection :
So the option (c) is the correct option
Answer:
Explanation:
The partial negative charge in a water molecule occurs because of differences in electronegativity between the atoms involved. A water molecule (H2O) consists of two hydrogen atoms and one oxygen atom. Oxygen is significantly more electronegative than hydrogen, which means it has a stronger attraction for electrons.
In a covalent bond between hydrogen and oxygen, such as in a water molecule, electrons are shared between the two atoms. However, because oxygen is more electronegative, it pulls the shared electrons closer to itself, creating an uneven distribution of electron density. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+).
The electronegativity difference between hydrogen and oxygen causes the electrons in the covalent bonds to spend more time around the oxygen atom, making it partially negatively charged. This partial negative charge on the oxygen atom and the partial positive charges on the hydrogen atoms give water its polar nature. This polarity plays a crucial role in various chemical and physical properties of water, such as its ability to form hydrogen bonds, its high surface tension, and its unique solvent properties.
(2) The atom’s radius decreases and the atom becomes a positive ion.
(3) The atom’s radius increases and the atom becomes a negative ion.
(4) The atom’s radius increases and the atom becomes a positive ion.
When an atom loses an electron, it becomes a positive ion and the radius of the atom decreases. The correct answer is option 2.
An atom is the basic unit of matter that consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons.
Therefore, option 2. The atom’s radius decreases, and the atom becomes a positive ion is the correct answer.
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Answer:
When an atom loses an electron, the atom's radius decreases and the atom becomes a positive ion.