Answer:
2. have no negative particle
Explanation:
Helium atoms contains 2 neutrons and 2 protons (or 2 electrons). Thus, it has a mass number of 4 and atomic number of 2.
Alpha particles are heavy and positively charged, which make them to be deflected in a magnetic or electric charge. So, the helium atoms used as alpha particles for the gold foil experiment must have no negative particle.
The skeletal muscles work in pairs always
hope it worked !!!
Producción de leche, cabello, temperatura corporal constante y sistemas circulatorios y respiratorios altamente desarrollados.
<u>Advantages</u>:-
Following mentioned are a few enlisted positive effects (of using windmills):
• It is cost-free; in other words it is inexpensive or affordable.
• In fact it is and can be an alternate for fossil fuels.
• Moreover, wind energy is a domestic source of energy.
• It helps in controlling air pollution which is a huge threat to life.
• Furthermore, it utilizes merely a small amount of land the rest of which can be used by farmers wisely.
Written by: Mmkhn