Question

word bank: nucleus compound molecule electron

1. the _ is the positively charged center of an atom that contains protons and neutrons.
2. the negatively charged particle of an atom is the _.
3. sugar is a(n) _ because it has the elements carbon, hydrogen, and oxygen chemically bonded in a set ratio.
4. a water _ is the particle made of 2 hydrogen atoms and 1 oxygen atom, chemically bonded together.

Explanation:

• For question 6: The nucleus is the positively - charged center of an atom with protons and neutrons.
• For question 7: Electrons are the negatively - charged particles in an atom.
• For question 8: A compound is a substance made of two or more elements chemically bonded in a fixed ratio. Sugar (with C, H, O) fits this.
• For question 9: A molecule is a group of atoms bonded together. A water molecule has 2 H and 1 O atoms.

Answer:

1. nucleus
2. electron
3. compound
4. molecule