Select the correct words from the drop-down menus to complete the sentence. Metallic bonds are found in bronze between atoms of copper and tin. The atoms of copper, a _ bond with the atoms of tin, a _ to form metallic bonds

A metallic bond of copper atoms with metallic bond of tin atoms to form metallic bond.

Explanation:

Metallic bond is a type of bond that is formed between positively charged atoms in which there is sharing of electrons between them.

Metallic bonds are formed between metal atoms. When metal atoms unite, they share electrons among themselves and each one of them has valence electrons.

Bronze is an alloy of metals and it consist of copper and tin which makes them to be bonded by metallic bond.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.