What methods did geologists use when they first developed the geologic time scale

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

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro