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The answer is to do with electronegativity difference. Metals generally have low values and non metals higher values. When an element with a low value combines with an element with a high value, usually the element with the low value LOSES electrons to form a positive ion while the other element gains the electron(s) and forms a negative ion. So an ionic compounds is formed. Compoiunds of this type usually contain a metal elements joined to non-metal element - so compounds 2 and 3 in your list are ionic.
When the compound is made from only non-metal elements, electrons are not lost or gained but shared as these elements tend not to lose electrons or gain them. Instead they share electrons to make covalent bonds. If the result are small structures they will be molecular eg 1 and 4 in your list.
What else can I help you with?
Are molecules only found in compounds?
No, molecules can exist both in compounds and as individual elements. In compounds, molecules are formed when atoms chemically bond together. In the case of elements, some exist as diatomic molecules (like oxygen, O2), while others exist as single atoms (like helium, He).
Do ionic compounds exist as molecules?
No, ionic compounds do not exist as molecules. Instead, they form a lattice structure where positively and negatively charged ions are attracted to each other through electrostatic forces.
Can molecular compounds exist as separate molecules due to covalent bonding?
Yes, molecular compounds are formed through covalent bonding where atoms share electrons to form molecules. These molecules can exist as separate entities due to the strong bonds between the atoms.
Why elements and all compound exist as molecules?
Elements can exist as molecules when they combine with other elements to form compounds due to the sharing or transfer of electrons, creating stable structures. These molecules are held together by chemical bonds, which can be covalent, ionic, or metallic, depending on the types of elements involved. The formation of molecules allows the elements to achieve a more stable configuration, following the octet rule and minimizing their energy state.
What evidence is there ionic compounds exists as ions in their pure state while molecular compounds exist as molecules in their pure state?
Oh, dude, so like, ionic compounds are made up of ions, which are like charged particles, so they exist as ions in their pure state. And molecular compounds are made up of molecules, which are like groups of atoms held together by chemical bonds, so they exist as molecules in their pure state. It's like, basic chemistry, man.
Are molecules only found in compounds?
No, molecules can exist both in compounds and as individual elements. In compounds, molecules are formed when atoms chemically bond together. In the case of elements, some exist as diatomic molecules (like oxygen, O2), while others exist as single atoms (like helium, He).
Do ionic compounds exist as molecules?
No, ionic compounds do not exist as molecules. Instead, they form a lattice structure where positively and negatively charged ions are attracted to each other through electrostatic forces.
Can molecular compounds exist as separate molecules due to covalent bonding?
Yes, molecular compounds are formed through covalent bonding where atoms share electrons to form molecules. These molecules can exist as separate entities due to the strong bonds between the atoms.
Why elements and all compound exist as molecules?
Elements can exist as molecules when they combine with other elements to form compounds due to the sharing or transfer of electrons, creating stable structures. These molecules are held together by chemical bonds, which can be covalent, ionic, or metallic, depending on the types of elements involved. The formation of molecules allows the elements to achieve a more stable configuration, following the octet rule and minimizing their energy state.
What evidence is there ionic compounds exists as ions in their pure state while molecular compounds exist as molecules in their pure state?
Oh, dude, so like, ionic compounds are made up of ions, which are like charged particles, so they exist as ions in their pure state. And molecular compounds are made up of molecules, which are like groups of atoms held together by chemical bonds, so they exist as molecules in their pure state. It's like, basic chemistry, man.
Why ionic compounds don't exist in form of molecules?
I'm on dat good kush and alcohol.
Do ionic compounds exist as discrete molecules?
No, ionic compounds exist as a crystal lattice structure in which positively charged ions are surrounded by negatively charged ions in a repeating pattern. This structure extends in three dimensions, rather than forming discrete molecules.
Organic compounds exist as discrete molecules with much weaker intermolecular forces than those seen in ionic compounds?
Yes, that's right. Organic compounds are typically made of covalently bonded molecules, which have weaker intermolecular forces like van der Waals forces or hydrogen bonding compared to the strong electrostatic forces in ionic compounds. This is why organic compounds have lower melting and boiling points than many ionic compounds.
Why is all compounds molecules?
All elements and compounds are present in molecular state. They cannot be found as individual atoms. Atoms cannot exist in free state.
Are there any molecules or formulas for neon?
Under normal conditions of temperature and pressure, neon forms no elemental molecules. It can possibly form compounds with some other, extremely electronegative, elements. These compounds, if they exist, would have formulas.
Is a molecule also a compound?
Not necessarily. A molecule is the smallest unit of a chemical compound that can exist independently, while a compound is a substance made up of two or more different elements chemically bonded together. All compounds are molecules, but not all molecules are compounds.
Are elements and compounds are made of atoms?
Yes. Elements are composed of individual atoms. Compounds are composed of molecules, which are chemical combinations of atoms. Some pure elements exist as molecules containing various numbers of combined atoms, such as atmospheric oxygen (O2) and ozone (O3).
