Which of the following describes nuclear fission? a. an electron is ejected when a neutron becomes a proton. b. a high-energy gamma ray is released from a nucleus. c. a parent element splits into two daughter elements. d. two separate nuclei are joined to become one nucleus.

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What is a metal replacement reaction