It seems like you have provided a list of answers for a unit test related to matter interactions. If you're looking for a review, clarification on these concepts, or any further explanations, feel free to ask! Here's a brief overview based on the answers you've provided:
- Electrons are negatively charged subatomic particles located outside the nucleus of an atom.
- Atomic Models typically show the number of protons and neutrons, which can help determine the mass number of an atom.
- Atoms in lithium sulfide are connected by ionic bonds, which are formed between metals and nonmetals.
- Chlorine (Cl) is a nonmetal found in Group 17 of the periodic table.
- Elements in the same group of the periodic table often have similar reactivity due to their similar electron configurations.
- The melting of ice is a physical change because it involves a change of state without altering the substance's chemical identity.
- Chemical reactions often result in the formation of new substances as bonds are broken and formed.
- The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, indicating no atoms are gained or lost.
- The atomic mass of an element like Copper (Cu), which is approximately 58.44 amu.
- Mass conservation can be illustrated by measuring the mass of ice before and after melting, showing that mass is conserved in physical changes.
- The atomic number of carbon is six as it has six protons.
- The chemical formula for water is H2O, indicating it consists of two hydrogen atoms bonded to one oxygen atom.
- & 14. "Do it yourself" suggests a need for personal engagement in experiments or conclusions.
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