The pair K and Br would form an ionic bond because K is a metal and Br is a non metal.
To answer your question about which of these pairs would form an ionic bond, let's look at each pair:
1. K (Potassium) and Br (Bromine) - K is a metal and Br is a non-metal. Metals tend to lose electrons, while non-metals tend to gain electrons. This transfer of electrons results in an ionic bond. Therefore, K and Br would form an ionic bond.
2. C (Carbon) and H (Hydrogen) - Both are non-metals, so they tend to share electrons, forming a covalent bond instead of an ionic bond.
3. H (Hydrogen) and O (Oxygen) - Both are non-metals, and they also tend to share electrons, forming a covalent bond rather than an ionic bond.
4. Cu (Copper) and Cu (Copper) - Since they are the same element and both are metals, they do not form an ionic bond.
In summary, the pair K and Br would form an ionic bond.
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Answer:
boiling water
sharpening a pencil
freezing water
What answers are there? you didn't add them.
physical change and chemical change.
physical change affects a substance's physical properties, and a chemical change affects its chemical properties.
The isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.
The isotope 40Ar refers to the isotope of argon, which has an atomic number of 18.
Since the atomic number represents the number of protons in an atom, we can conclude that the isotope 40Ar contains 18 protons.
Argon is a neutral atom, so the number of electrons also matches the number of protons. Therefore, the isotope 40Ar contains 18 electrons.
To find the number of neutrons, we need to subtract the atomic number (protons) from the mass number (protons + neutrons). The mass number of 40Ar is 40. Subtracting the atomic number of 18 from the mass number gives us:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 40 - 18
Number of neutrons = 22
Therefore, the isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.
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Answer:
18 protons, 18 electrons, 22 nuetrons
Explanation:
Argon has an atomic # of 18. Atomic #s show the amount of protons and electrons it has. Atomic mass - atomic # = # of nuetrons. 40-18=22