Answer:
Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.
Atom: has equal number of +ve charge (protons) and -ve charge electrons and hence atom has charge.
Neutrons (having no charge) and protons are present in nucleus. Electrons keep revolving around the nucleus in different shells.
When can HFC-134a become combustible in a mobile air condition system?
if shop air is used in the system in an attempt to check for leaks
1. When the Earth is closer to the sun it receives more heat than when it is further from the sun. But this orbital shape changes over time, affecting the Earth's overall climate situation. This variation is known as eccentricity and it changes over a period of about 100,000 years
2. The movement of the Earth around the Sun combined with the tilt of the Earth's axis causes weather, seasons and climate. The Sun causes weather patterns and the long-term average of weather patterns creates climatic zones around the world. The combined average regional climates create the Earth's climate.
D .stomata -releases oxygen made during cellular respiration
