What type of metal is yellowish gold brittle, hard, heavy and easily soldered

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates