What is the temperature of gas and volume of gas

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

What element breaks down into yttrium-90?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98