Compounds are formed when two or more are chemically combined. when these elements are combined, a new substance is formed with new chemical and physical . an element is a substance that cannot be separated into simpler substances by or chemical means. a compound is two or more elements chemically to produce a new substance. when two or more elements chemically combine, the compound has new properties, different from the chemical and physical properties of the elements.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.