G'day love! An elements atomic number is the amount of protons in an element!
Lilium lancifolium is an autotroph since it is a plant and makes its own food through photosynthesis.
The average acceleration is -5.0 m·s⁻².
The formula for acceleration (<em>a</em>) is
= 25 m·s⁻¹;
= 0;
= 5.0 s
∴
= -5.0 m·s⁻²
The negative sign tells you that the object is <em>slowing down</em>, i.e., it is <em>decelerating</em>.
To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.