The answer is D. obsidian. Or at least I think it is. Just guessing based off me playing Minecraft 6 years ago haha
A particle is defined as a small potion of matter. From its definition, then a single atom can be considered as an atom. This is because an atom is the smallest unit of matter. Also, a molecule can be considered as a particles since it is a small portion of a certain object.
Answer:
Option C: sodium and potassium
Explanation:
Elements in same group having same properties. In given option Only C is the correct option because sodium and potassium are present in same group i.e, group 1 and thus shows similar reactive properties. Bothe are alkali metal and have one valance electron. These are very reactive and can not found in free state in nature but present in compounds.
They react with halogens and form salts.
2Na + Cl₂ → 2NaCl
2K + Cl₂ → 2KCl
All other options are incorrect because,
Option A = Fluorine and neon
Both are present in different group. Fluorine is present in group 17 and neon in group 18 thus their reactivity is not similar.
Option B = Hydrogen and helium
Both are present in different group. Hydrogen is present in group 1 and helium in group 18 thus their reactivity is not similar.
Option D: Aluminum and chlorine
Both are present in different group. Aluminum is present in group 13 and chlorine in group 17 thus their reactivity is not similar.
All these three options are incorrect.
Answer:
b. has a low specific heat capacity.
Explanation:
Hello,
In this case, since the specific heat is defined as the heat required to increase or decrease 1 degree Celsius 1 gram or mole of a specific substance, we infer that the lower the specific heat, the less energy will be needed for such increase or decrease, therefore, it turns out easier to modify the temperature in a substance that b. has a low specific heat capacity.
Best regards.
Answer:
4.Current and static electricity
Explanation: