Definitely D. Abiotic means non-living and all creatures mentioned are alive except minerals.
Correct answer: 18
The outermost shell is full when that shell reaches 2(n²) electrons distributed by holding-capacity of each layer, where n is the outermost shell number. The element with an atomic number of 18 has 18 electrons around it. For the first shell, it is full when it has two electrons [2(1²)= 2 on the first shell]. The second shell is full when it has six electrons [2(2²)= 2 on the first shell + 6 on the second]. The third shell is full when it has 8 electrons [2(3²)= 2 on the first shell + 6 on the second + 8 on the third shell]. 18 electrons fill up the outermost shell of the element.
Answer:A
Explanation:
Your muscular system is at work
<span>Lewis structure of both is similar:
H : CI (hydrogen chloride)
</span>
<span>K : CI (potassium chloride)</span>
Answer:
Net ionic equation:
H⁺(aq) + OH⁻(aq) → H₂O(l)
Explanation:
Balanced Chemical equation:
HClO₂(aq) + NaOH(aq) → H₂O(l) + NaClO₂ (aq)
Ionic equation:
H⁺(aq) + ClO₂⁻(aq) + Na⁺(aq) + OH⁻(aq) → H₂O(l) + Na⁺(aq) + ClO₂⁻ (aq)
Net ionic equation:
H⁺(aq) + OH⁻(aq) → H₂O(l)
The ClO₂⁻(aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.