Strontium (Sr) is a silvery metal element that burns an intense color in air and reacts with water. Which of the following elements will share similar properties?A. Potassium (K) B. Calcium (Ca)C. Yttrium (Y)D. Tin (Sn)

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

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

Which fact represents evidence for the big bang theory?