Question

match the word to the correct definition. then write one sentence using each word about science.

1. ___ ionic bond
2. ___ covalent bond
3. ___ ion
4. ___ molecule
5. ___ compound
6. ___ electrons
7. ___ element

Explanation:

1. Ionic bond: A chemical bond formed by the transfer of electrons between atoms, creating ions that attract each other. Sentence: Sodium and chlorine form an ionic bond to create sodium - chloride (table salt) in science experiments.
2. Covalent bond: A chemical bond formed by the sharing of electron pairs between atoms. Sentence: In water (H₂O), hydrogen and oxygen atoms are joined by covalent bonds.
3. Ion: An atom or molecule that has a net electrical charge due to the loss or gain of electrons. Sentence: Positively - charged sodium ions play a crucial role in nerve impulse transmission in biological science.
4. Molecule: A group of two or more atoms held together by chemical bonds. Sentence: Scientists study how different molecules interact in a chemical reaction.
5. Compound: A substance made up of two or more different elements chemically combined in a fixed ratio. Sentence: Carbon dioxide is a compound essential for photosynthesis in plant science.
6. Electrons: Subatomic particles with a negative charge that orbit the nucleus of an atom. Sentence: The movement of electrons is fundamental to understanding electrical conductivity in physical science.
7. Element: A pure substance made up of only one type of atom. Sentence: Oxygen is an element necessary for aerobic respiration in living organisms.

Answer:

1. Definition: A chemical bond formed by the transfer of electrons between atoms, creating ions that attract each other. Sentence: Sodium and chlorine form an ionic bond to create sodium - chloride (table salt) in science experiments.
2. Definition: A chemical bond formed by the sharing of electron pairs between atoms. Sentence: In water (H₂O), hydrogen and oxygen atoms are joined by covalent bonds.
3. Definition: An atom or molecule that has a net electrical charge due to the loss or gain of electrons. Sentence: Positively - charged sodium ions play a crucial role in nerve impulse transmission in biological science.
4. Definition: A group of two or more atoms held together by chemical bonds. Sentence: Scientists study how different molecules interact in a chemical reaction.
5. Definition: A substance made up of two or more different elements chemically combined in a fixed ratio. Sentence: Carbon dioxide is a compound essential for photosynthesis in plant science.
6. Definition: Subatomic particles with a negative charge that orbit the nucleus of an atom. Sentence: The movement of electrons is fundamental to understanding electrical conductivity in physical science.
7. Definition: A pure substance made up of only one type of atom. Sentence: Oxygen is an element necessary for aerobic respiration in living organisms.