Anion Y − có cấu hình electron: 1s22s22p63s23p6. Trong bảng tuần hoàn Y thuộc ( giải thích) A. chu kì 3, nhóm VIIA. B. chu kì 3, nhóm VIA.

C. chu kì 3, nhóm VIIIA. D. chu kì 4, nhóm IA.

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

Which compound contain an iron with a 3+ charge

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point