The property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard is : Hardness and Brittleness
Those properties make chalk leaves residues on the board every time friction happen between the chalk and the board
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Answer:
Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms. There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.
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Cations, lose
Explanation:
Positive ions are cations and they result when an atom lose electrons.
An atom is made up of subatomic particles:
- Protons are positively charged particle in the nucleus of the atom
- Neutrons carry no charges and they share the nucleus with protons.
- The electrons are negatively charged.
- When an atom loses an electron, it becomes a positive ion because the number of protons is now more than the number of electrons.
- An anion forms in a reverse way.
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