Answer:
Zirconium has 40 protons and 51 neutrons
Answer:
82 days would take a distance like that, if we drive at 120 mi/h
Explanation:
Distance from Earth to moon is 3.8×10⁵ km
You drive at a speed of 120 mi/h
Let's convert the 120 mi/h to km/h
1 mi = 1.61 km
Then 120 mi . 1.61 km / 1mi = 193.2 km
New velocity is 193.2 km. Therefore,
193.2 km are driven in 1 hour
3.8×10⁵ km woul be driven in (3.8×10⁵ . 1)/ 193.2 = 1966.8 hours
1967 hours . 1 day / 24 hours = 82 days
A melting point of over 700 C and a density of less than 2 g/cm3 can be observed for many group 2 elements. In this group, the density increases on moving down the group, whereas the melting point increases upto calcium and then starts decreasing.
Calcium, symbol Ca is the element with melting point around 840 C and density of 1.55 g/cm3 which is closest to the specified data range .
Chlorobenzene would essentially be a benzene ring that is substituted with chlorine. Thus it would have 6 carbon atoms, in its molecular formula.
Answer:
A
Explanation:
The iron corrodes so it oxidized
