Preheat the oven to 450°F. Place the chicken, potatoes, and lemon in an ungreased 9x13-inch pan. Season with salt and pepper, add the oil, and toss to coat. Bake for 30 minutes, or until the internal temperature of the chicken is 165°F and the skin is golden brown. Let rest for 5 minutes then squeeze the lemon over the chicken and potatoes. Serve.