It represents the number of protons in the nucleus of an atom which determines the chemical properties of an element.
Answer:
The bottle is labeled pure so it probably is pure.
Explanation:
The ability for gas to mix with other substances is diffusion.
Answer:
Two non bonded electron pairs and four bonded electron pairs
Explanation:
An image of the compound as obtained from chemlibretext is attached to this answer.
The ion ICl4- ion, is an AX4E2 ion. This implies that there are four bond pairs and two lone pairs of electrons. As expected, the shape of the ion is square planar since the lone pairs are found above and below the plane of the square. This is clear from the image attached.