Examlex

Solved

Based on the Fossil Record, Which Group Appeared First

question 69

Multiple Choice

Based on the fossil record, which group appeared first?


Definitions:

Single Covalent

A type of chemical bond where two atoms share one pair of electrons.

Ionic Bond

A chemical bond formed between two ions with opposite charges through the transfer of electrons from one atom to another.

Triple Covalent

A type of chemical bond where three pairs of electrons are shared between two atoms.

Hydrogen Bond

An unstable linkage between two molecules due to the electrostatic force acting between a proton within one molecule and an electronegative atom in the other.

Related Questions