Answer:
Yes it is B,D.
Explanation:
Each box represents an element and contains its atomic number, symbol, average atomic mass, and (sometimes) name. The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.
Iron is the element found in the liver
Answer:
your answer is C
Explanation:
The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.
Which of the following terms best describes the nucleus of a radioactive element?
C. Unstable
Answer:
d = 20.89 g/cm³
Explanation:
Given data:
Length of block = 4.20 cm
width of block = 3.80 cm
Height of block = 5.40 cm
Mass of block = 1800 g
Density of block = ?
Solution:
First of all we will calculate the volume.
V = l×w×h
V = 4.20 cm ×3.80 cm× 5.40 cm
v = 86.18 cm³
Density:
d =m/v
d =1800 g/ 86.18 cm³
d = 20.89 g/cm³
