Which type of magma forms composite-cone volcanoes? O rhyolitic magma
O tephra magma
O andesitic magma
basaltic magma

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

How many valence electrons are in atom of radon?

According to thomson, the atom is a positively charged cloud with electrons scattered throughout. what would the alpha particles do when they hit the foil if thomson were correct