carbon's atomic number is =6
oxygen's atomic number is=8
potassium's atomic number is=19
arsenic's atomic number is=33
lodine atomic number is=53
calcium's atomic number is=20
boron's atomic number is=5
neon's atomic number is=10
protons
carbon=6
oxygen=8
potassium=19
arsenic=33
lodine=53
calcium=20
boron=5
neon=10
electrons
carbon=6
oxygen=8
potassium=19
arsenic=33
lodine=53
calcium=20
boron=5
neon=10
groups of the elements
carbon group 6
oxygen group 14
potassium group 1
arsenic group 15
lodine group 17
calcium group 2
boron group 5
neon group 18
valence electron
carbon 2;4
oxygen 2
potassium 1
calcium 2
boron 3
neon 0
lodine 1
cation or anion
c-
o+
k+
ca+
l-
b3+
ne+
as+
Answer:
A
Explanation:
firstly, conservation because by planting trees, the land dat was once proned to erosion is covered thereby conserving de land and reforestation because, u hv replaced trees dat were once cut there
The complete question is :
The success of plants extending their range northward following glacial retreat is best determined by _____.
A) whether there is simultaneous migration of herbivores
B) their tolerance to shade
C) their seed dispersal rate
D) their size
Answer: The seed dispersal rate
Explanation:
The seed dispersal can be defined as the movement of the seeds away from the parent plant. The ability of the plant to extend is completely dependent on the ability of the plant to disperse its seeds.
Plants have very limited ability, they need vectors to carry its seed from one place to another.
The biotic and abiotic vector both are involved in carrying the seeds which helps in expansion of the trees.
hence, the correct answer is option C
