Consider neutral atom which has 11 protons and 12 neutrons in the nucleus. The atomic number of the element is [1] 11. The mass number for this atom is [2] 23. The number of electrons is [3] 11. The name of element is [4] sodium which has symbol [5] Na.

Metals are elements which always from cations – positive ions. Metal atoms loose electrons when bond with other atoms.

Particles in solids and liquids are close to each other in a sample causing solids and liquids to have definite volume and being compressible.

Element is the simplest type of matter – it cannot be broken down to any simpler substances.

Use l’Hospital’s rule, if applicable, to find the limit.

Find the equation of the tangent line at the given point on the curve.x2 + y2 + 2y = 0; (0, -2)

Find the indicated absolute extremum as well as all values of x where it occurs on the specified domain.f(x) = x3 – 3×2; [0, 4]Minimum

Assume x and y are functions of t. Evaluate dy/dt.xy + x = 12; dx/dt = -3, x = 2, y = 5

Solve the problem.Find two numbers x and y such that their sum is 420 and x2y is maximized.

Find the indicated absolute extremum as well as all values of x where it occurs on the specified domain.f(x) = x3 – 2×2 + 3x – 4; [-2, 5]Minimum