The more protons in the nucleus, the stronger the attraction of the nucleus to electrons. This stronger attraction makes it more difficult to remove electrons. Within a group, the ionization energy decreases as the size of the atom gets larger.
Answer:
Over 700,000 lives are taken by the AIDs virus every year. Hepatitis C claims the lives of over 200,000 people each year and haemorrhagic fevers caused by viruses such as Ebola have resulted in over 20,000 deaths.
Explanation:
Answer:
D. Z, X, Y
Explanation:
Step 1: Z
Within the Sun two protons fuse together and when this proton-proton pair breaks apart one proton transform into neutron due to weak nuclear force. Along with transformation of neutron, a positron also formed and proton-neutron pair sometimes form deuterium.
Step 2: X
Collision of third proton takes place with deuterium and this collision results in formation of Helium-3 along with gamma rays. These gamma rays are also released as sunlight.
Step 3: Y
Collision of two Helium-3 nuclei takes place which results in creation of Helium-4.
Answer:
Yes, sublimation is a physical change because it involves a change of state from solid to gas of a substance when it is heated.
Assuming that the 18.8% composition is based on mass,
therefore the mass of Lithium would simply be the product of the fractional
composition and the total dose. That is:
18.8 % = 0.188
mass Lithium = 0.188 * 1.00 g = 0.188 g
Answer:
<span>0.188 g</span>
